5 Piece Diamond Drill Bits Set, Core Drill Bits for Hard Materials - Tiles Ceramics Glass Stones – Built in Coolant, Fast Dry Drilling - Sizes 3/16" 1/4" 5/16" 3/8" 1/2" - Round Shank, Storage Case

Love these for drilling plates for tiered trays!

These drill bits are a great value for drilling porcelain tile

Filled with wax, need to heat up to empty the wax. Cuts thru ceramic slowly. Not a lot of diamond on the cutting edge.

The drills worked great. It didn’t take long to drill through the granite countertop.

I used this tool in the bathroom shower on some tile that I needed to put some holes in for screws. You must wok slow with this, it got the job done.

The price was good

I bought these for 10 holes I had to drill in 1/2" porcelain floor tile that was the hardest material I've ever had to drill thru. I have expensive lifetime warranty drill bits that are good to use on tile, concrete, brick, etc, and even wore out the 3/16th bit while drilling this porcelain floor tile so I bought these diamond coated drill bits to see if they'd do a better job. Bottom line is this tile was extremely difficult to drill through and you don't want to press to hard or you could crack the tile which would've been a complete nightmare if that happened. These bits performed awesome, I used a bit of water at all times to keep the bits as cool as possible and I ended up using 2 of these bits for 10 holes and they worked fantastic. Took about 15 mins per hole as I didn't want to press down too hard and damage the tile. I highly recommend these bits, they did the job perfectly fine and for the money they cost it was well worth it imo.

I paid almost $40 for two Milwaukee diamond bits - each one drilled three holes in porcelain tile then failed. Paid $16 for five Deckrkat bits and was amazed at the performance. One bit drilled six holes through porcelain and still had meat left on the bone. Outstanding quality at a great price. Thank you!