12-inch Black Impact Star Bit Set, 9 Pieces, Sizes E10 to E24, Model 84601, designed for use with air wrenches and impact tools for loosening and tightening Torx screws in heavy-duty applications. Features high-quality manufacturing from hardened steel to withstand torque and impacts, with a black coating resistant to rust and wear. Provides strong stability and professional performance in automotive workshops and mechanical maintenance.