Features and Benefits Half Cut TORX design increases Torque yield S2 steel, the strongest hardest bit drivers available Half Cut TORX drivers also drive TORX Plus Knurled body for fingertip control Limited Lifetime Warranty Half Cut TORX Drivers have the same Patented TORX shape as standard TORX tools but have the length of the Torx cut down by 1/2 its normal length dimension. 1/4" square drive, with 3/4" overall length, heat treated to 58-62 RC. The 1/2 CUT design increases strength of the tools because the Torx seats deeper into the fasteners and engages into the larger radius of tool. The fit into the fastener feels better with less wiggle or wobble. These Tools can also be used to drive TORX Plus fasteners. Satin chrome plated drivers packaged in durable plastic storage case.