Replaces twenty-three separate size wrenches with this one compact tool. The narrow profile allows it to fit into the tightest of workspaces and a ten degree tapered head leaves plenty of knuckle clearance too. Each end of the wrench features a hexagonal head with an adjustable piston slider to provide a three sided, full surface contact fitting with the bolt. Even works to extricate damaged, stripped and rounded-off bolts. The HK1 uses a unique hydrokinetic slider system to easily adjust to the proper size. Turn the valve located in the center of the wrench a quarter turn to release piston slider, adjust diameter and tighten for a firm, custom grip on each bolt. Heavy-duty, cold forged steel construction and nickel plating combined with ultimate versatility make this tool destined to become a favorite. 7.25”×.5”, 10 oz.