The KTI 27511 Socket is a 12 pt 11 mm short socket. It is made of heat-treated, chrome-molybdenum alloy with a black oxide finish. It has a 3/8 in (9.5 mm) drive size and a 11 mm length.
The KTI 27510 KTI Socket is a 12 pt 10 mm socket designed for use with a 3/8 drive ratchet. It is made of hardened steel with a black oxide finish for long lasting use.
The KTI 27516 socket is a short 3/8" drive 12 pt. 16mm socket. It is made of high-quality steel for long-lasting use. The socket is designed for use with a ratchet and wrench.