Designed for efficient fastening in steel building and HVAC applications. Popular with metal building and roofing contractors, this screwdriver delivers 2500 rpm and 140 in-lb of torque for maximum driving power. The smooth action, 21-position clutch slips with minimum reaction force when the screw head reaches the selected torque. It features a self-locking, quick-change chuck for convenient accessory changes and a comfortable grip this balanced, lightweight tool makes it easy to join thin gauge to heavier gauge materials.