The full edge-to-edge diamond surfaces on the benchstones makes for quicker, more efficient sharpening. The red, Coarse side (120 grit) will aggressively recondition your blades, while the blue Fine (600 grit) side will maintain and refine your edges. A great addition to any craftsman’s workshop, the diamond abrasives on the benchstones are excellent for repairing and maintaining a large range of tools from dull and damaged kitchen knives, to well maintained woodworking chisels. Following Lansky’s commitment to functional design the diamond stones are housed in a high impact plastic case with rubberized no-slip base that raises the stone for maximum safety and efficiency. Additionally, screw receivers have been built into the base for optional bench mounting.