Complex surface is mainly used for metal and nonmetal of the hole, and a variety of internal R surface of the workpiece, the chamfered surface grinding, polishing characteristics:: use emery cloth cover safety, environmental protection, good heat dissipation, Burkina effective stick with emery cloth knot strength, easy to layer specifications: diameter (1/2 '' 5/8 '' 3/4 '' 1 '' 1.5 '' 2 '' 3 '') tablets Number: A40 - A400