XtremepowerUS Metric MM Pro-Grade Tamper Proof Security Torx Star Bit Socket, 13-Piece 1/4" Sizes: T8H, T10H, T15H, T20H, T25H, T27H, T30H, (37mm Length) 3/8" Sizes: T40H, T45H, T47H, T50H, T55H, (48mm Length) 1/2" Sizes: T60H, (55mm Length) Pro Grade Set in Hard-to-Find Tamper Proof Security Type Constructed of High Grade Chrome Vanadium Alloy Steel; Mirror Chrome Finish