Chicago Pneumatic 828H 1/2" Heavy Duty Air Ratchet. The cp-828h ratchet has been designed to dramatically increase tool life and maximize operator comfort. New, advanced, patented head design. Floating spindle reduces wear. Dual ball design for rolling friction at each end. Hardened washers eliminate housing wear. Roll pins prevent washers from slipping. Patented ergonomic square-handle design for a positive, comfortable grip. Efficient 1/2 hp motor and triple idler planetary gear system provide up to 50 ft lb of torque to handle the tough jobs. Teasing throttle for precise speed control throughout operating range. Specifications: square drive - 1/2", standard bolt size - 3/8", cfm - 4, hose size - 3/8", torque range - 10 to 50 ft lbs, ultimate torque by hand - 125 ft lbs, speed - 150 rpm.