... case packing is best for holding and protecting; 1/2" Twin Hammer Air Impact Wrench Max. torque: 450 FT/LBS Free speed: 7000RPM ... :2,20 kg. 16PCS1/2" AIR IMPACT WRENCH KIT 1pc-1/2" Twin hammer air impact wrench 10pc- impact sockets: 9,10,11,13,14,17 ... ,19,22,24,27mm1pc-1/2"dr. x 5extension bar ...