Sealey 12 piece spline socket set 1 2 sq drive total drive sealey premier ak70612 chrome vanadium steel spline sockets hardened and heat treated for strength half chrome satin finish with knurled ring for corrosion resistance and extra grip even with oily fingers all sockets are equivalent to metric hex and bi hex sockets with many being also equivalent to imperial hex imperial bi hex and trx star sockets sealey ak70612 spline socket set 12pc 1 2 sq drive total drive