Monster DHP0050 Diamond Polishing Stone Review

I work with glass and have used diamond handpads of all grits for over 35 years and work with them wet for grinding and polishing. The good ones from 3M were getting very expensive so I decided to give these a try. I ordered green, black and red pads. This rating applies to everyone. There are two reasons for my one star rating. First, the hand pads wear out fairly quickly, so I wasn't expecting them to last as long as 3M's more expensive brand. But after a few minutes they were useless. Some…