HiKOKI WR36DEJRZ 36v MULTI VOLT 1/2\" Square Drive Impact Wrench Inc 2x 2.5Ah/5.0Ah Batts Powerful, Best-in-Class Torque Easy to Use, Compact & Lightweight Design. The HiKOKI WR36DE Impact Wrench comes with four Auto-Stop modes for a variety of applications and will stop after a preset amount of time has passed to prevent the over-tightening of bolts. Thanks to the unique design of dust-protective cooling windows and fully plastic coating on some important inner parts, this product conforms to IP56 protection class ratings (dust and water resistance) for electrical equipment as stipulated by the international IEC regulations. Tool supplied with 2x Batteries, 1x Charger and 1x Carry Case.  The tool comes with four Auto-Stop modes for a variety of applications and will stop after a preset amount of time has passed to prevent over-tightening of bolts:                           Rotation Speed: 1,500/min / 1,800/min / 2,100/min / 2,400/minAuto Stop Time: Approx. 0.5 sec / Approx. 1.0 sec / Approx. 1.5 sec / Approx. 2.0 secUse: Pre-tightening of wheel nuts or pipes / Pre-tightening of wheel nuts or pipes / Pre-tightening bolts in steel frame assembly / Pre-tightening bolts on heavy machinery / bridges The correct tightening torque depends on the material, size and class of the bolt. Make a test fastening to adjust the mode setting to suit the bolt   FEATURES Auto Stop Modes Prevent Over-tightening Efficient brushless motor Powerful tightening & loosening torque Compact at 169mm in length IP56 dust & water resistant SPECIFICATION Capacity; Ordinary Bolt: M10 - M24, High Tension Bolt: M10 – M20 Square Drive: 1/2\" / 12.7mm Tightening Torque: 770Nm Nut Busting Torgue: 1,050Nm Battery Voltage: 36v No Load Speed: (4) 0 – 2,400/min / (3) 0 – 2,100/min / (2) 0 – 1,800/min / (1) 0 – 1,500/min Impact Rate: (4) 0 – 3,400/min / (3) 0 – 3,000/min / (2) 0 – 2,600/min / (1) 0 – 2,200/min Overall Length: 169mm