Draper 98960 XP20 20V Brushless 1/2" Impact Wrench 300Nm supplied with 2 x 4Ah Batteries and Fast Charger.
XP20IW1/2.1000K

Draper Tools Professional range XP20 20V Brushless Motor 1/2" Impact Wrench with a 1000Nm Torque Capacity.
Supplied complete with 2 x 4Ah Batteries, a Fast Charger and a heavy duty carry case.
Expert Quality High performance brushless motor with Intelligent SCB technology and FG reinforced housing
Smart reverse for advanced tool control (stops impact and slows rotation when bolt/nut is loosened)
4 speed/ torque settings : 100Nm, 300Nm, 700Nm & 1000Nm
Super bright LED worklight Variable speed control with electronic brake
Max Torque 1000Nm

As with all impact wrenches - To confirm that the fixing is at the correct or required torque, always use a good quality, scaleable torque wrench after using an impact wrench for complete torque accuracy.