Mini Sharpeners are very handy to carry with you or just have close by in the shop. The sharpening area of each is 2-3/4" by 1"wide by 3/16" thick. The Set includes one fine (600 grit), one extra fine (1200 grit) and one coarse (325 grit) sharpener. These small sharpeners use the same top quality monocrystalline diamonds to assure long cutting life and a constant flat surface. Use dry or with water as a lubricant.