8 PC 1/2″ DR. DEEPWELL SOCKET SIZES: 13, 14, 15, 17, 18, 19, 21, 22MM. TAPERED SOCKET HEADS FOR EASIER ACCESS TO BOLTS AND NUTS. SET INCLUDES 1PC DURABLE MOLDED PLASTIC CASE. NOTCHES IN SOCKETS LOCK ONTO RATCHETS OR EXTENSIONS.