TORX Driver Bit - T30 - 3-1/2" - Quick-Change Shank High Quality T30 (T-30) Torx/Star Drive Bit 3.5" Long. Torx Bit Size Engraved on Driver Bit. EACH Bit is Made of High Quality Tool Grade S2 Industrial Steel for Long Torx/Star Driver Bit Life. Torx/Star Drive Bit Set is Impact Rated. Quickly Drive Torx/Star Head Screws with T30 Heads. T 30 Quick Change Shank for Quick Bit Size Selection. 1/4" Drive Bit Hex Shaft For Standard Drills Use with Screw Heads Requiring T30 (T-30) Bit Drivers. 3-1/2" Bit for wood screws, machine screws, +