They're way good. No, really. The resin holds the diamonds of the abrasive in place (vs it being stuck on a surface) and the square surface (vs. rounded) is much easier to use and use well. It has a lower point load.
We're results focused... and these work great. Use it wet or dry.
Consider only using these with trailing edge strokes... where the spine leads the motion for best results.
IMAGE for reference only.
MADE IN USA