STANLEY Adjustable Wrench: Alloy Steel, Chrome, 10 in Overall Lg, 1 1/4 in Jaw Capacity, Plain Grip

These lever-locking adjustable wrenches have a lever mechanism that locks the jaws in place like locking pliers to tightly grip the fastener. A screw mechanism located at the bottom of the head adjusts the jaws to fit a variety of fastener sizes.