Bosch GDS 18 V-LI HT

Best price: £552 | Battery: 18V Li-ion

This monster Bosch tool is for heavy users who need its 650Nm punch. Like the Sealey, the bolt test was over in a flick of the trigger, plus you get a long run time with the 5Ah batteries. As with so much professional kit, you can tailor the package to suit your needs and with 4Ah batteries it’s around £100 less. Still not cheap, but you get a lot for your money including a battery indicator and a work light on the base.