XMS-801P… Brass Through the Mirror Screw Mount Set. 3 Piece Set includes screw, metal cap and plastic protector. One 1″ long mirror screw with polished brass screw on decorative metal cap and plastic protector. Mirror is actually held in place by the screw and plastic insert and the brass cap functions only as a decorative cover. Cap is 1/2 inches in diameter and 3/16 inches high. Plastic Protector fits 9/32 inch hole. Mirror Mount.