Clamp

The utility model relates to the technical field of production equipment, in particular to a clamp which comprises two clamping arms, each clamping arm comprises a clamping portion, an anti-skid groove is formed in the side, making contact with a workpiece, of each clamping portion, and a frosted hard black layer is arranged on the side, making contact with the workpiece, of each clamping portion. Frosted hard black layers are arranged on the groove bottoms and the groove walls of the anti-skid grooves; the plurality of anti-skid grooves are distributed in a laser grid manner; the clamping arm further comprises a connecting part, and a locking hole is formed in the connecting part. A positioning hole is also formed in the connecting part; the clamping arm comprises a mounting section, a connecting section and a clamping section which are sequentially connected, the clamping part is located at the free end of the clamping section, and the length direction of the clamping section is perpendicular to the side, m