Usage Tips:1Applicable Models: Primary drive locking tool is fit for Touring Panhead,Shovelhead, Evolution, Twin Cam engines, but not for all Big Twins 2007 to present. 2Main Functions: The primary drive locking tool locks cams and crankshaft sprockets, and is used to lock the primary drive in place when removing or installing the primary drive assembly. 3Drive Locking Hub Nut: Wedges into the top of the sprocket to remove the motor sprocket nut, the wedge between the front sprocket and the main chain is located at the bottom to the torsion nut. 4Excellent Load Bearing Capability: Primary drive chains locking tool is made of engineering plastics, which is sturdy and durable and has a long service life and excellent load bearing capability. 5Easy to Use: Primary drive chains locking tool is designed to be easy to use, so you can use it easily, which is convenient and practical for you.