1/4" AIR SCREWDRIVER(SUPER POWER) 2 steps thorttle trigger proper lightweight ergonomics design handle exhaust , 360 degree free rotatin BOLT CAP.:6~8MM;SQ.DRIVE:1/4" MAX.TORQUE:195N-M(145FT-LB) FREE SPEED: 9000 RPM LENGTH:172MM;WEIGTH:1.05KG