Features and Benefits: Patented bit holding system forces bit surface to opposing side for maximum retention; Chrome sockets; heat treated for durability and service ability; S2 and Alloy steel bits; Packaged in patented impact resistant "Slide Rail" System for ease in socket storage; 10 Piece Torxr Press Fit Set (1/4" and 3/8" Dr.) includes T10, T15, T20, T25, T27, T30, T40, T45, T50, and T55 Sockets packaged on a clip rail.; 10-Piece Torxr Press Fit Set (1/4 in. & 3/8 in. Dr.) includes T10, T15, T20, T25, T27,T30, T40, T45, T50, & T55 Skts.packaged on a clip rail.