Built for speed to rapidly advance fasteners. The Mach series bit driver set provides 50 percent more torque， using the break-away handle feature， than a regular screwdriver with a 90 degree twist action. Offset shaft and smooth spin handle allows for a rapid crank action. Retractable screw guide sleeve on tip keeps flat tips and stubborn fasteners engaged. Full metal break-over joint built into the multi position handle provides added strength for high torque when used in the T-handle position.