(2 pack) Hyper Tough 6 Piece Diamond Bit Set for Rotary Tools, Carbon Steel, 1/8-Inch Shank - 6 Count Pack

they last FOREVER i sand down and polish rocks , minerals,and gem's. i can do around 3:00 to 4 rocks for each tip.

I purchased this to drill holes in my ceramic plant pots. It is easier for me to have the drain holes than allow the plant to sit in water.

Great price. Bits work well on stone.

works with dewalt cordless drill/driver

Because I thought that they're going to be like normal size drill bits and they weren't there like mini but the pricing was beyond fair so I can pass that up but you know you get what you pay for because they broke almost immediately upon using only like 12 or still intact

It seemed as though the coatng of diamond became dull rather quickly. I put three small holes into a ceramic tile. I did not use water so maybe that's why. I didn't use a lot of pressure I took my time. It worked okay and for the price it was fine

I bought these bits to drill a hole in a sheet of normal window glass. I tried each bit in turn graduating from small to large and was never able to complete even the smallest hole. I have a high speed portable drill which has a great deal of torque but these bits just didn't do the job.

I needed a drill bit for drilling a hole in ceramic planters. Because they said diamond tip, I thought these would work, but they didn't do a thing..not even a scratch. So, I went to Home Depot..

Cheap and for a reason. All of my diamond bits from other companies have been far superior to these. They lack the hardness and the resolve to stay together long enough to affect any change in the surface of stone and their diamond coating is gone before I can adjust my rotary tool's speed

I tried using these for wood carving on a soft piece of bass wood and they wouldn't work highly recommend not buying.