Review on Mgtgbao 38Mm Green Diamond Beveling Chamfer Bit, 1-1/2" Diamond Countersink Drill Bits With 5/8-11 Inch Thread For Enlarging, Polishing And Bevelling Granite Marble Tiles Size Of 0 To 1-1/2" Inch by Rich Schobinger

Pros:- Solid build and well made in comparison to other bits like this I have seen- Grit is evenly distributed- Works great with my Milwaukee M18 angle grinder to clean up sharp holes and cuts- I believe it works fine as I tried on a sample piece of marble and granite both dry, but I believe it would be better wet as it tends to chalk up, even though this does not seem to diminish the cutting as I was able to determineCons:- none yetI'll use this over time and if it disappoints I'll update my review, but for $23 I don't think I could go wrong with this bit in my tool drawer.