T9206 – 6 Piece 1/2 Drive Impact Sockets Spline The three most popular spline/XZN bit sizes in one handy set. 43 and 78mm length to suit different applications. Chrome molybdenum with manganese phosphate finish for added corrosion resistance. Suitable for use with any impact tool. Supplied in a storage case with snap lock and a metal hinge (170x90x35mm). SOCKET SPLINE (XZN) 1/2 INCH DR. SIZES: 921814 – 14 X 43MM 921816 – 16 X 43MM 921818 – 18 X 43MM 923814 – 14 X 78MM 923816 – 16 X 78MM 923818 – 18 X 78MM