LOT Pcs Diamond Hole Drill Bits - Cutting Tools Review

Bought these to drill two holes in a granite countertop. The beats work well. If you keep the bits wet as directed on the packaging, they will cut quickly and cleanly. The only downside to these bits is that they don't have a pilot drill to start a pilot hole to hold the bits in place so they can slip and scratch the surface. I just attached four pieces of wood to the top, leaving a hole big enough for the drill to not move. . However, after drilling individual holes, the cutting edge looked…

Worked great. Much better than the expensive ones I bought thinking they would wear out. I only really needed a few sizes but the kit was cheaper than buying those two pieces. I had to buy two sets as I had 6 drill holes in granite and 8 drill holes in marble. One of these nozzles made 4 marble holes with no problem. The larger size also made the other 4 no problem. Then I used a more expensive drill bit I bought for granite. It was 1 1/2 times the price of this entire set. I drilled a hole in…

I got these to drill a few holes in my 1cm granite under counter water filter racks. After making two holes I figured these hole saws would be good for another 2-3 max, but as I won't be making any more anytime soon I can't be sure. Some things to look out for: Size, so use a sharp one (makes your life easier) - they're not very deep, so if you have anything thicker than 1 inch find another hole saw - you'll run into a plain one brown paper bag in a padded envelope - If using a variable speed…