Use this simple level to restore a vehicle's camber setting after strut repair or installation. This allows the technician or customer to safely drive the vehicle before a more precise wheel alignment can be performed. It's more accurate than other methods. Also useful for repairs on CV joints, ball joints and tie rod ends. It's easy to use, simply place on the rotor before repair and zero the level. Then tighten the wing nut. Finally after the repair, push or pull on the strut until the level returns to zero position.