Find a quality Milwaukee M18BIW12-202C 18v compact 1/2 inch drive impact wrench 2 x 2.0Ah batteries
1/2 AIR IMPACT WRENCH HEAVY DUTY DRIVE HIGH TORQUE 425 FT/LB AIR TOOL CT1080
Electric Impact Wrench Cordless with 1/2 inch Drive & Sockets Set (14/17/19/22mm), High Torque 420N.m 18V Battery Powered Rechargeable with LED Light + Carry Box : Amazon.co.uk: DIY & Tools
Powerful Air Impact Wrench Gun 1/2" Half Inch Drive High Torque 520 lb-ft | eBay
Snap On 1/2 Inch Drive Impact Wrench CTU4850 Body Available Worldwide | eBay
NoCry 20V Cordless Impact Wrench - 300 ft-lb (400 Nm) Torque, 2700 Max IPM, 2200 RPM, 1/2 Inch Anvil; 4.0 Ah Battery, Fast Charger, Belt Clip & Carrying Case Included : Amazon.co.uk: DIY & Tools
Sealey SA602 Air Impact Wrench 1/2 Inch Square D | Toolstop