1.useful for running small fasteners in tight space. 2.Designed for body shop works, radiator,spark plug , air condition works 1. Useful for running small fastener in tight space2. Designed for bodyshop works,radiator, spark plug, air condition works.Free speed:150RPM Max torque:45FT-LB Air consumption:4CFM Air inlet:1/4" Max air pressure:90PSI Net weight : 1.17kg 1/2" air ratchet wrench