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 wrench. For all Belt Drive LTD (BDL) complete chain drive kits and chain drive baskets with BDL chain drive clutch hubs. Maximum torque on tapered mainshaft hub nuts is 50 -60 ft. lbs. and 70-80 ft. lbs. on the splined clutch hub nut. Not an impact wrench that can damage the clutch hub. Made in the U.S.A..