Used to lock up the clutch hub and basket assemblies to help properly torque the clutch hub nut to a specified torque specification using a torque wrenchFor all Belt Drive LTD® (BDL) complete chain drive kits and chain drive baskets with BDL chain drive clutch hubsMaximum torque on tapered mainshaft hub nuts is 50 -60 ft. lbs. and 70-80 ft. lbs. on the splined clutch hub nutNot an impact wrench that can damage the clutch hubMade in the USA