Review on Mgtgbao 38Mm Green Diamond Beveling Chamfer Bit, 1-1/2" Diamond Countersink Drill Bits With M14 Thread For Enlarging, Polishing And Bevelling Granite Marble Tiles Size Of 0 To 1-1/2" Inch by Jamie Kamoso

Ours came defective,the bit doesn’t fit the adapter, the paint is scratched up on the bottom and it’s missing several of the diamond parts on the bit. They were not in the package so it came that way.that would affect the way it worked so is a big problem. As you can see from my pictures the diamonds are missing, the scratches on the bottom, are just cosmetic I would think, although it could rust. The picture showing that it didn’t screw in all the way shows the problem with the bit, the adapter screwed into another product I have fine so that wasn’t the issue, the screw part of the bit is bad. All together this product isn’t usable, to sure if it is just a bad one they sent me or if there are several or all made that way. I can not recommend this product as it isn’t usable.