---
product_id: 487338251
title: "K1 Pro Professional Cutting-Edge Brushless Motor Advanced Rock Tumbler Polisher Kit, Large 2.5Lb Barrel with 3-Speed & 9-Day Timer, Includes All Accessories, Ideal Gift for Adults & Collectors"
brand: "komestone"
price: "€ 283.11"
currency: EUR
in_stock: true
reviews_count: 8
category: "Kome Stone"
url: https://www.desertcart.fi/products/487338251-k1-pro-professional-cutting-edge-brushless-motor-advanced-rock-tumbler
store_origin: FI
region: Finland
---

# 9-day programmable timer with 3 speeds Brushless motor - 20,000+ hrs quiet power 2.5 lb extra-large soft rubber barrel K1 Pro Professional Cutting-Edge Brushless Motor Advanced Rock Tumbler Polisher Kit, Large 2.5Lb Barrel with 3-Speed & 9-Day Timer, Includes All Accessories, Ideal Gift for Adults & Collectors

**Brand:** komestone
**Price:** € 283.11
**Availability:** ✅ In Stock

## Summary

> 💎 Turn rough stones into museum-quality gems—quietly, efficiently, professionally.

## Quick Answers

- **What is this?** K1 Pro Professional Cutting-Edge Brushless Motor Advanced Rock Tumbler Polisher Kit, Large 2.5Lb Barrel with 3-Speed & 9-Day Timer, Includes All Accessories, Ideal Gift for Adults & Collectors by komestone
- **How much does it cost?** € 283.11 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/487338251-k1-pro-professional-cutting-edge-brushless-motor-advanced-rock-tumbler)

## Best For

- komestone enthusiasts

## Why This Product

- Trusted komestone brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Control:** Customize your polishing with a smart LCD featuring a 9-day programmable timer and 3-speed settings for pro-level results.
- • **Silent Powerhouse:** Experience ultra-quiet, brushless motor technology delivering over 20,000 hours of smooth, maintenance-free operation.
- • **Max Batch Capacity:** Polish more stones at once with the extra-large 2.5 lb soft rubber barrel that absorbs impact and reduces noise by 75%.
- • **Complete Starter Kit:** Includes everything you need—rough rocks, 4-stage grit system, ceramic media, extra belts, and a full-color guide to master rock tumbling.
- • **Safe & STEM-Approved:** Certified non-toxic and kid-safe, perfect for educational fun that sparks creativity and geological curiosity in all ages.

## Overview

The K1 Pro Rock Tumbler by KomeStone is a professional-grade polishing kit featuring a brushless motor with 20,000+ hours of quiet operation, a 2.5 lb soft rubber barrel for large batch processing, and a 9-day programmable timer with 3 speeds. It includes a complete 4-stage grit polishing system, ceramic media, and all necessary accessories, making it ideal for hobbyists, collectors, and STEM learners. Certified non-toxic and family-friendly, it offers durable, mess-free tumbling with a leak-proof lid and comes backed by a 2-year warranty and 90-day satisfaction guarantee.

## Description

desertcart.com: K1 Pro Professional Cutting-Edge Brushless Motor Advanced Rock Tumbler Polisher Kit, Large 2.5Lb Barrel with 3-Speed & 9-Day Timer, Includes All Accessories, Ideal Gift for Adults & Collectors : Toys & Games

Review: Quiet Power for Big Batches: Home Rock Tumbler Review - I bought it because I wanted an at home option to polish rough rocks into smooth gems without sending everything to a workshop. The extra-large 2.5 lb barrel and a 9-day programmable timer sounded perfect for longer cycles and batching several stones at once. In everyday use, setup was straightforward. I load the rocks, four grit packs, and ceramic media, seal the leak-proof lid, pick a speed and start. The three speeds and the brushless motor make it feel responsive, and the drum runs smoothly and quietly compared with older machines. What clearly stands out is the four-stage grit system that yielded a clean, museum-like shine after a couple of cycles. The soft rubber barrel seems to absorb impact well, and I appreciate how much less noise it makes during operation. The included instruction book and extra belts and grit packs were helpful in getting started. One small caveat is that it takes a bit of practice to dial in the timing and grit order for different rocks, but once you get the rhythm it becomes predictable. Overall I’m impressed by the capacity, quiet operation, and consistent results, and I’d give it five stars.
Review: Rock Tumbler: A Gem of a Machine (Mostly) - Alright, rock enthusiasts and aspiring geologists, gather 'round! I recently acquired the KomeStone K1 Pro Professional Cutting-Edge Rock Tumbler, hoping to transform my collection of backyard pebbles into sparkling treasures worthy of a museum (or at least, my mantelpiece). This machine is, indeed, cutting-edge... or at least, it cuts through the rough edges of rocks with impressive dedication. It's like a tiny, geological spa for your stones, giving them the smooth, polished glow they've always dreamed of. My rocks are now so shiny, I'm pretty sure they're starting to develop egos. The "professional" part? Well, it certainly sounds important, and it feels pretty robust. It hums along, doing its thing, turning mundane rocks into mini works of art. I've spent an embarrassing amount of time just watching it spin, mesmerized by the slow, steady transformation. It's surprisingly therapeutic, almost like a lava lamp, but with more potential for bling. My only minor quibble is that I now have an overwhelming urge to collect all the rocks. Every walk is an archaeological dig, every pebble a potential masterpiece. My pockets are perpetually full, and my family is starting to eye me suspiciously when I bring home yet another bag of "future gems." This tumbler is so effective, it's turning me into a rock hoarder. So, if you're looking to polish your pebbles (and perhaps your patience), the KomeStone K1 Pro is a solid investment. Just be warned: you might develop a serious case of "rock fever." It's a gem of a machine, and I'm totally rocking my new hobby!

## Features

- 𝟗𝟎-𝐃𝐚𝐲 𝐒𝐚𝐭𝐢𝐬𝐟𝐚𝐜𝐭𝐢𝐨𝐧 𝐆𝐮𝐚𝐫𝐚𝐧𝐭𝐞𝐞 & 𝟏-𝐘𝐞𝐚𝐫 𝐖𝐚𝐫𝐫𝐚𝐧𝐭𝐲: Enjoy peace of mind with our extended 90-day refund guarantee and 1-year warranty. If you miss desertcart's 30-day return window, simply contact our 𝐔𝐒-𝐛𝐚𝐬𝐞𝐝 𝐜𝐮𝐬𝐭𝐨𝐦𝐞𝐫 𝐬𝐞𝐫𝐯𝐢𝐜𝐞 team for 𝐡𝐚𝐬𝐬𝐥𝐞-𝐟𝐫𝐞𝐞 𝐫𝐞𝐩𝐥𝐚𝐜𝐞𝐦𝐞𝐧𝐭 𝐨𝐫 𝐫𝐞𝐟𝐮𝐧𝐝 𝐚𝐬𝐬𝐢𝐬𝐭𝐚𝐧𝐜𝐞. We offer 𝟐𝟒/𝟕 𝐜𝐥𝐚𝐢𝐦 𝐬𝐮𝐩𝐩𝐨𝐫𝐭 to ensure your complete satisfaction.
- SAFE FOR KIDS – CERTIFIED NON-TOXIC AND FAMILY FRIENDLY: KomeStone rock tumblers enjoys the CPC certification (Children's Product Certificate) issued by the federal government, and made from non-toxic, child-safe materials, ensuring a fun and educational STEM learning experience parents can trust. Smooth edges, secure closures, and low-noise operation make it a safe and engaging rock tumbler gift for curious young explorers.
- DIVE INTO THE FUN ROCK TUMBLING: KomeStone rock tumbler is for turning rough raw rocks into smooth gemstones. You’ll be excited to see the rocks change with each cycle—a great lesson in patience for kids or inspiration for jewelry-making moms.
- 2025 K1 PRO UPGRADE: Professional Tumbling Innovation Features a smart LCD with 9-day programmable timer, 3 speeds, and pause function. Its brushless motor ensures 20,000+ hours of quiet operation, while the military-grade thickened rubber barrel guarantees durability. Create museum-quality gemstones with pro-level control.
- 2.5 LB EXTRA LARGE CAPACITY & QUIETER: We use the 100% soft rubber barrels which can absorb the impact of the tumbling rocks and it’s 75% quieter than that of other plastic drums, which likes the sound of a working dishwasher. With 2.5lbs extra large barrel, that means you can polish more rocks at once than 1 lb drum.
- COMES WITH EVERYTHING YOU NEED: Including the tumbler machine, the barrel, 1lb rough rocks, extra belts, 4 polishing grits and ceramic filler media (As a gift in package) and other accessories, etc. Especially the full-color Instruction book, detailed and clear to follow, even a starter knows how to use it independently.
- SCIENCE-BACKED POLISHING FOR PRO-LEVEL RESULTS: Achieve museum-quality shine with our 4-stage grit system (60/120/150/1200) and precision ceramic media. The leak-proof stainless steel lid ensures mess-free tumbling, while our exclusive guide unlocks pro techniques.
- About KomeStone: KomeStone rock tumblers are the first with brushless motor technology and now lead U.S. sales by a wide margin. We are more than a manufacturer — we’re your partner, offering reliable products and lifetime support you can count on.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B69CK2VG |
| Age Range Description | 13 years and up |
| Best Sellers Rank | #5,904 in Toys & Games ( See Top 100 in Toys & Games ) #2 in Kids' Rock Tumblers |
| Brand Name | KomeStone |
| Color | Brushless Motor: K1 Pro |
| Customer Reviews | 4.4 out of 5 stars 3,471 Reviews |
| Educational Objective | Creativity |
| Included Components | 1 pound of rocks & 4 bages of polishing grits & ceramic pellets, 1 rock tumbler base & 1 rubber barresl, 2 PU belts & user instructions, jewelry fastenings & adaptor & screwdriver & mesh strainer |
| Item Dimensions | 11.22 x 9.02 x 5.17 inches |
| Item Type Name | Rock Tumbler |
| Item Weight | 2.5 Pounds |
| Manufacturer | KomeStone |
| Manufacturer Maximum Age (MONTHS) | 1200.0 |
| Manufacturer Minimum Age (MONTHS) | 156.0 |
| Manufacturer Warranty Description | 2-Year Warranty for free exchange against manufacturing defects |
| Material Type | Brushless motor, Rubber, Stainless Steel, 𝐂𝐏𝐒𝐈𝐀 & 𝐂𝐏𝐂 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 |
| Number of Players | No Limit |
| Operation Mode | Automatic |
| Power Source | AC adapter |
| Size | 11.3 x 9.17 x 5.87 inches |
| Subject Character | Turn raw rocks smooth enough to use for jewlery, crafts, collections, etc., to teach kids learn more about science, geology and mineralogy. |
| Supported Battery Types | No batteries required |
| Theme | Perfect gift choice for the families or friends |
| Unit Count | 1.0 Count |

## Images

![K1 Pro Professional Cutting-Edge Brushless Motor Advanced Rock Tumbler Polisher Kit, Large 2.5Lb Barrel with 3-Speed & 9-Day Timer, Includes All Accessories, Ideal Gift for Adults & Collectors - Image 1](https://m.media-amazon.com/images/I/81WpuUctItL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quiet Power for Big Batches: Home Rock Tumbler Review
*by D***3 on November 1, 2025*

I bought it because I wanted an at home option to polish rough rocks into smooth gems without sending everything to a workshop. The extra-large 2.5 lb barrel and a 9-day programmable timer sounded perfect for longer cycles and batching several stones at once. In everyday use, setup was straightforward. I load the rocks, four grit packs, and ceramic media, seal the leak-proof lid, pick a speed and start. The three speeds and the brushless motor make it feel responsive, and the drum runs smoothly and quietly compared with older machines. What clearly stands out is the four-stage grit system that yielded a clean, museum-like shine after a couple of cycles. The soft rubber barrel seems to absorb impact well, and I appreciate how much less noise it makes during operation. The included instruction book and extra belts and grit packs were helpful in getting started. One small caveat is that it takes a bit of practice to dial in the timing and grit order for different rocks, but once you get the rhythm it becomes predictable. Overall I’m impressed by the capacity, quiet operation, and consistent results, and I’d give it five stars.

### ⭐⭐⭐⭐⭐ Rock Tumbler: A Gem of a Machine (Mostly)
*by K***O on July 16, 2025*

Alright, rock enthusiasts and aspiring geologists, gather 'round! I recently acquired the KomeStone K1 Pro Professional Cutting-Edge Rock Tumbler, hoping to transform my collection of backyard pebbles into sparkling treasures worthy of a museum (or at least, my mantelpiece). This machine is, indeed, cutting-edge... or at least, it cuts through the rough edges of rocks with impressive dedication. It's like a tiny, geological spa for your stones, giving them the smooth, polished glow they've always dreamed of. My rocks are now so shiny, I'm pretty sure they're starting to develop egos. The "professional" part? Well, it certainly sounds important, and it feels pretty robust. It hums along, doing its thing, turning mundane rocks into mini works of art. I've spent an embarrassing amount of time just watching it spin, mesmerized by the slow, steady transformation. It's surprisingly therapeutic, almost like a lava lamp, but with more potential for bling. My only minor quibble is that I now have an overwhelming urge to collect all the rocks. Every walk is an archaeological dig, every pebble a potential masterpiece. My pockets are perpetually full, and my family is starting to eye me suspiciously when I bring home yet another bag of "future gems." This tumbler is so effective, it's turning me into a rock hoarder. So, if you're looking to polish your pebbles (and perhaps your patience), the KomeStone K1 Pro is a solid investment. Just be warned: you might develop a serious case of "rock fever." It's a gem of a machine, and I'm totally rocking my new hobby!

### ⭐⭐⭐⭐⭐ Nerdy excited!!! LOVE THIS TUMBLER!
*by Y***Y on November 13, 2025*

I ordered this on impulse as my daughter had a national geographic tumbling kit. That one is mediocre at best, however I've always wanted to have one. So, I bought the pro K-1 brushless, and I'm impressed with the rubber basin and how airtight sealed it is. Works incredibly well! Functions are simple to use. Great storage capacity also. The instructions are detailed, easy to understand, easy to follow through. They provide two extra pulley belts for the machine. A screwdriver to pop the lid, as the lid recesses into the rubber basin. There's another lid that goes over that with a butterfly style handle/screw. I have mine set up in my shed, as it's much quieter than the previous rock tumbler I experimented with. This one is awesome because it has a built-in timer that sets how many days you would like to tumble the rocks. The instructions have guidelines and suggestions. And then it also has the speed ratio. There's a pause/play button, so if at any time you want to check on the progress of your tumbling, you may do so and press pause and not lose your day counts by powering it off. This kit comes with grits, step 1- thru 4. They're one time use. KomeStone has grit kits available to purchase and reasonably priced for future tumbling sessions. I'm obviously on day 1, but I'm excited to check back in a few days. Not sure if Amazon allows for video updates or anything of that nature, but I'll try if it allows.

## Frequently Bought Together

- KomeStone K1 Pro Professional Cutting-Edge Brushless Motor Advanced Rock Tumbler Polisher Kit, Extra Large 2.5Lb Barrel with 3-Speed Motor 9-Day Timer, 6 Belts, Rough Gemstones, 4 Polishing Grits etc.
- Rock Tumbler Polishing Grits and Ceramic Tumbling Media Kit | Essential for Polishing, 4 Steps Rock Tumbling Refill Media, Polish up to 25 lbs of Rocks, Work with Any Rock Tumblers, for More Tumbles
- Rock Tumbler Belt 5-Pack for KomeStone K1, K1 Pro, K3 – Includes 2 Upgraded PU Belts + 3 Rubber Belts – Durable Replacement Kit, Not for K2 or K4

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-22*