💎 Gemstone Diamond Engraving Jewelry Cutting Tools by BQLZR Review

This is junk, the material comes off immediately. I used 20 bits when trying to drill a hole in a piece of steel. I made a 1/8 inch hole 1/2 inch. A real diamond crown would easily do this. Do not be fooled.

I did a lot of rock drilling and these are by far my favorite hole saws. Before I got them I had a couple of these rocks that I don't think I can pierce, and these little ones go through them with relative ease. I use my cheap Harbor Freight drill press and am excited to go to my shop to see how many bricks I can make. I've only used 3 of the 100 bits that came in and my performance is already way better! Super happy! As these items ship from China, it takes a little longer than expected, but…

Diamond coating varies from drill to drill. Bought these diamond coated bits to drill holes in pieces of recycled glass and insert strands of fiber optic cable. Everyone needs to know that the drill bit (diamond coating) has to be submerged in water (for it to work at all). Bits don't work at all without a water bath to submerge the part being drilled. The hole should start at an angle. After the hole has been started, the drill can be directed. Let the drill do its job, if you use too much…