The 4x4x3/4" Precision Tool Steel Lapping Plate is used for medium cutting, optical finish, super finish, fine finish, and supreme finish. It features a waffle groove design for sharpening and flattening tasks. The diamond grit compound ensures precise and efficient metalworking. Ideal for CNC, metalworking, and manufacturing industries, this lapping plate provides high-quality finishing compounds for achieving smooth and consistent results.