Stanley Locking Adjustable Wrench 250mm (10 in) STA085610 The patented locking mechanism applies more gripping force than conventional adjustable wrenches, giving more than 3,000lb holding force. It grips damaged fasteners better than a traditional adjustable wrench. It is two tools in one - an adjustable wrench and gripping plier.This locking adjustable wrench is fully forged from chrome vanadium steel. Maximum opening: 30mm. Size: 250mm (10 in). STA085610