Counterbored workholding grippers include metric sizes from 12-24 mm to complement existing line which ranges from 1/2-1 in., square and round. They are offered in coarse, fine, and extra-fine tooth patterns, as well as in high-speed tool steel, heat treated to Rc 62. Grippers mount using socket head cap screw from serrated face. This eliminates complete tear-down of fixture when replacing gripper.