Phillips insert bits power bit professional quality rental 6 inches length - 1/4 inches hex shank Made of high-grade S2 tool steel and milled for precise fit. Specifically built for the higher torque requirements of power tools; can be used with drill chuck or quick change chuck adapter in applications such as appliance, automotive, aviation, decking, drywall, electronics, furniture assembly, general construction and HVACR; 1/4 inches hex shank.