Dry Diamond Drill Bits Set, 5 Pcs Tile Drill Bits for Porcelain, Ceramic, Granite, Marble, Stone, Glass Hard Materials, Round Shank 1/4", 5/16", 3/8", 1/2" Drill Bits, with Storage Case

We were installing a window shade on our porcelain tile window. My husband bought one diamond blade for $16.00 and it drilled ONE HOLE! We ordered 2 sets of these diamond drill bits (5) for $16.00 thinking we can try and drill the 8 holes we needed will all 12 bits. Considering it was the same price for 5 that we paid for 1, we had to try. He was able to get all 7 remaining holes drilled with 2 bits. (probably could have gotten it done with one bit, but he needed to push too hard with the used bit)Great bit sets!!!!

Never used a diamond tipped drill bit before but these worked great to drill several holes through 1/2” slate tile. 👍

Bought this set so that I could put a drainage hole in the bottom of a large ceramic pot. Slow and steady, start at an angle and spray with water to cool the bit and ceramic. The set was relatively inexpensive and arrived quickly. I have only used the largest bit one time, but it did and amazing job! Will be taking them to work for installing fixtures in a tiled restroom.

Used this set to drill holes through interior rock veneer to hand a commercial sign. I was able to drill through without any issues. Truth be told my drill died before these bits did.Quality- Yes!Value - Yes!Easy to use - Yes!Speed - depends on the user, but these have bite if you follow the instructions!

Great bits for the price. Are you going to mount this on the next mars rover? Are you a tradesman and need a 1000 holes? Then this isn't for you. Are you a homeowner and need a couple a holes in tile or concrete, once every few years? Then this is perfect. It's cheap and gets the job done.Tips:1) The drill bits come with wax inside the bit for cooling when used dry. Remove this and use as a wet bit.2) With the wax removed, you can also poke a cheapo HSS drill bit to push/drill out the core. A hole goes from end-to-end that helps.3) Some hammering may be needed in step two as cores may get twisted and/or caught on diamond grit on the inside. When pushing/hammering, don't put the diamond side down to preserve the cutting edge, use a vice, and be careful not to bend the bit.

The specs for my reverse osmosis water countertop faucet called for a 12.5 mm (0.492" or ~1/2 inch) hole through my 1-1/4 inch granite countertop. I ordered this set which consists of two 1/4", one 5/16", one 3/8" and one 1/2" bit and a plastic storage case.I wet-drilled my countertop with the 1/2" bit and was surprised that I could not fit the faucet in the hole. I ended up using the 1/2" bit as a reamer of sorts and, with some additional time and effort, managed to widen it enough for the faucet to fit. Thankfully, the bit was durable enough to use in this fashion and, after the unexpected step, looks no worse for wear.Here are measurements taken (using a digital caliper) for all the included bits in case anybody needs them. Measurements are in fractional and decimal inches and in the form of: (As-marked fractional inches, As-marked decimal inches, As-measured decimal inches). All bits are new except for the 1/2" bit since I used it yesterday. As you can see, two bits are slightly undersized but the 1/2" bit was the worst offender and not by much. It's just under 12 mm. WIth bit wobble, the 1/4" bit will achieve that extra hundreth of an inch clearance to give a hole meeting spec.(1/4", 0.25", 0.241")(5/16", 0.3125", 0.315")(3/8", 0.375", 0.394")(1/2", 0.5", 0.470")Finally, these are "dry" diamond bits which means they are loaded with wax in the core. As you're drilling, the wax melts and lubricates the bit. There's at least one review here that claims that they are incapable of drilling thick material because they core is blocked. They even posted a picture. The "blockage" is wax and is easily removed (mechanically or with heat) if you want. In my case, I had a bit of the granite core break off and get stuck to the wax inside the bit and after heating the bit a little, managed to push through the wax and push the core out forcing a small screwdriver in through the back end of the bit.

Hanging a TV on the first place. Great bits that were much better than what I picked up at Home Depot. At Home Depot, I got one hole per bit for about $10 a copy. These bits did two holes per in 25% of the time.

I purchased these to drill drainage holes in ceramic planters. I've used the smallest and largest bit once each, and they did the job well. The body of the bits are covered in a cheap, black paint that prevents them from slotting smoothly into a drill upon first use. The paint peals off easily, however. Unsure why it's painted to begin with?

The kit contains 8 drill of different sizes. I wanted to drill through stones (+/-2 inches). I did as I saw on utube and it works perfectly and doesn't wear down the bits. I put the stone in a small bowl, cover the stone with water and drill. I take out the debris frequently and it works. I did 3 stones with one drill bit and it still works.

Funcionan muy bien

We used the drill bits to drill holes in ceramics, for my succulent collection, with great results: clean holes, no breakage and very fast!

Los he probado varías veces y trabajan muy bien, no dañan para nada las superficies cerámicas y es una excelente opción en lugar de una broca de concreto.

Finally got the item, thank you.