The Triangular Diamond Polishing Pads are used with FEIN MultiMaster type oscillation tools for detailed polishing of granite, marble, concrete and other types of stones. They are 3" for each side. The entire set comes with 60 grit, 120 grit, 220 grit, 400 grit electroplated diamond pads and 800 grit, 1800 grit and 3500 grit resin diamond polishing pads. They can be used either wet or dry. The triangle diamond polishing pads are also suitable for Dremel Multi-Max, Rockwell SoniCrafter, Makita as well as Ryobi detail sanders.