---
product_id: 19128849
title: "(4) High Security Pro Series Keyed Alike Padlocks w/8 Keys, 6230NKA-4 w/BumpStop Technology"
brand: "master lock"
price: "€ 310.50"
currency: EUR
in_stock: true
reviews_count: 9
category: "Master Lock"
url: https://www.desertcart.fi/products/19128849-4-high-security-pro-series-keyed-alike-padlocks-w-8
store_origin: FI
region: Finland
---

# 5-pin spool tumbler cylinder Weather Tough corrosion shield BumpStop anti-bump tech (4) High Security Pro Series Keyed Alike Padlocks w/8 Keys, 6230NKA-4 w/BumpStop Technology

**Brand:** master lock
**Price:** € 310.50
**Availability:** ✅ In Stock

## Summary

> 🔒 Lock in elite security and never look back!

## Quick Answers

- **What is this?** (4) High Security Pro Series Keyed Alike Padlocks w/8 Keys, 6230NKA-4 w/BumpStop Technology by master lock
- **How much does it cost?** € 310.50 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/19128849-4-high-security-pro-series-keyed-alike-padlocks-w-8)

## Best For

- master lock enthusiasts

## Why This Product

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

## Key Features

- • **Pick & Pry Resistant:** Dual ball bearing locking mechanism and spool pins make picking nearly impossible.
- • **Lifetime Peace of Mind:** Backed by a limited lifetime warranty—security that lasts as long as you need it.
- • **Keyed Alike Convenience:** 4 locks, 8 keys all keyed alike—streamline access without fumbling multiple keys.
- • **Industrial-Grade Durability:** Solid alloy steel body with rustproof chrome finish built for harsh environments.
- • **Unmatched Anti-Bump Security:** BumpStop tech blocks lock bumping attempts, keeping your assets invincible.

## Overview

The Master Lock 6230NKA-4 Pro Series pack includes four high-security keyed alike padlocks with eight keys, engineered for commercial and industrial use. Featuring patented BumpStop technology, these locks prevent bump key attacks by blocking cylinder rotation. Constructed from solid alloy steel with a rustproof chrome finish and a weather-resistant cover, they withstand harsh outdoor conditions. The 5-pin spool tumbler cylinder and dual ball bearing locking mechanism provide superior pick and pry resistance. Each lock measures 2.5 inches wide with a 7/16 inch hardened boron alloy shackle, offering robust physical protection. Supported by a limited lifetime warranty, this set delivers reliable, long-term security with convenient keyed alike access.

## Description

FEATURING BumpStop TECHNOLOGY - Lock bumping a surprisingly simple method of breaking in through locked doors and padlocks - is undoubtedly the newest emerging threat to personal property security. And virtually all locks in use today are particularly vulnerable to bumping. Until now. BumpStop Advanced Cylinder Technology employs an innovative, patent pending design which utilizes a unique reverse rake tapered driver pin, high performance springs and tightly machined cylinder chambers. During a bump attempt, this design prevents the transfer of force from the bump key to the pins and therefore blocks rotation of the cylinder so that the lock remains locked.

Review: Smooth as a Swiss Watch - I am not a lock expert or even a lock enthusiast, but I am involved in the metal machining business and the excellent manufacturing standards that this lock is made to is outstanding - The lock was a bit rough in its movement when it first came out of the box but a generous dose of Royal Purple lubricant in every orifice made this little tough guy very smooth, very "Friendly" in it's operation - There are some tough manufacturing requirements in this lock and Master really nailed it - The materials are well chosen for the application as well - Also - Master made it easy to get spare keys so that is an extra reason to love this sweet little guy - Awesome lock Master Lock!!
Review: Great product - Excellent quality, very sturdy exactly as described

## Features

- Four (4) High Security Locks Keyed Alike w/ 8 Keys. ProSeries Padlocks are designed for Commercial/Industrial applications. Limited Lifetime Warranty.
- These locks feature the BumpStop Advanced Cylinder Technology. (for explanation see product details below).
- ATTENTION: If you order two 4-packs they will NOT necessarily be keyed the same. To ensure you get two 4-packs keyed alike, you must order the 8-pack.
- Ideal for harsh outdoor conditions - exclusive Pro Series Weather Tough cover protects lock from water, ice, dirt and grime. Solid iron shackle shroud resists harsh physical attacks. The removable cylinder can be replaced or re-pinned. 5 spool pin tumbler cylinder for added pick resistance. Dual ball bearing locking mechanism resists pulling and prying.
- Chrome rustproofing provides longer life. These high security, rekeyable 5-pin cylinders with spool pins are virtually impossible to pick. And a dual ball bearing locking mechanism resists pulling and prying.
- Dimensions: 2-1/2 (64mm) wide round solid steel body, each weighing 1.48 lbs. A 7/16 (11mm) diameter hardened boron alloy shackle with 1-1/8 (29 mm) inside height clearance.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B006M39G5Y |
| Additional Features | Key Lock |
| Best Sellers Rank | #107,585 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #282 in Keyed Padlocks |
| Brand | Master Lock |
| Brand Name | Master Lock |
| Color | Chrome |
| Control Method | App |
| Controller Type | Hand Control |
| Customer Reviews | 4.6 out of 5 stars 453 Reviews |
| Finish Types | Chrome |
| Included Components | 4 locks, 8 keys |
| Item Dimensions | 4 x 6 x 3 inches |
| Item dimensions L x W x H | 4 x 6 x 3 inches |
| Lock Type | Pin Tumbler |
| Manufacturer | Master Lock |
| Manufacturer Part Number | 6230NKA |
| Manufacturer Warranty Description | Limited Lifetime Warranty Master Lock Company LLC (“Master Lock”) grants the following warranty: If this product or any part of the product fails due to a defect in materials or workmanship at any time during the life of the product, Master Lock will, at its own discretion, repair or replace the product or part free of charge. Simply contact Master Lock at www.masterlock.com or 1.800.464.2088 for … |
| Material | Alloy Steel , Chrome |
| Material Type | Alloy Steel, Chrome |
| Model Name | 6230NKA |
| Model Number | 6230NKA |
| Number of Pieces | 4 |
| Recommended Uses For Product | Security |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special Feature | Key Lock |
| Style Name | Industrial |
| UPC | 071649108600 |
| Unit Count | 4 Count |

## Product Details

- **Brand:** Master Lock
- **Item dimensions L x W x H:** 4 x 6 x 3 inches
- **Lock Type:** Pin Tumbler
- **Material:** Alloy Steel, Chrome
- **Special Feature:** Key Lock

## Images

![(4) High Security Pro Series Keyed Alike Padlocks w/8 Keys, 6230NKA-4 w/BumpStop Technology - Image 1](https://m.media-amazon.com/images/I/71v1X+SKcCL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Smooth as a Swiss Watch
*by G***S on April 25, 2026*

I am not a lock expert or even a lock enthusiast, but I am involved in the metal machining business and the excellent manufacturing standards that this lock is made to is outstanding - The lock was a bit rough in its movement when it first came out of the box but a generous dose of Royal Purple lubricant in every orifice made this little tough guy very smooth, very "Friendly" in it's operation - There are some tough manufacturing requirements in this lock and Master really nailed it - The materials are well chosen for the application as well - Also - Master made it easy to get spare keys so that is an extra reason to love this sweet little guy - Awesome lock Master Lock!!

### ⭐⭐⭐⭐⭐ Great product
*by D***N on March 13, 2026*

Excellent quality, very sturdy exactly as described

### ⭐⭐⭐⭐⭐ Goldi locks
*by D***N on November 28, 2025*

Great Locks! I leave them out in the rain and snow, and they always work. Get as many as you can with the same key, so you don't have to carry a big wad of keys around.

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**Shop now:** [https://www.desertcart.fi/products/19128849-4-high-security-pro-series-keyed-alike-padlocks-w-8](https://www.desertcart.fi/products/19128849-4-high-security-pro-series-keyed-alike-padlocks-w-8)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-06-29*