we have got 2 of these at college, there pretty good, we use them on wheel nuts, hub nuts, anything thats hard to get off lol. never let me down exept from the battery not lasting all day when used all day, but other than that, there good.
Clarke CIR450 24V High Torque Cordless Impact Wrench
http://www.machinemart.co.uk/shop/pr...ordless-impact