The Durston Mfg./VIM Tools 1/2Cut Torx Security Drivers, No. HCTSD, come in a 22-piece set. The set includes 12 Half-Cut Torx Stubby Tamper Proof Security Drivers, in sizes T8 through T60, and 10 4" Long Half-Cut Torx Tamper Proof security Drivers, in sizes T8 through T50. The length of tbe Torx tip is cut to half the normal depth to increase strength and improve fastener engagement. Constructed of S2 steel, all tools are heat-treated to 58-62 RC.