MCS-514061 - US sizes. 21-piece. 1/2 inch drive. In shock resistant hard plastic box. With 12 point sockets. The heavy duty 1/2" ratchet drive features special positive lock system. Includes: 3/8; 7/16; 1/2; 9/16; 5/8; 11/16; 3/4; 13/16; 7/8; 15/16; 1"; 1-1/16; 1-1/8;