Feature Application ①8056 - For use with fan blade, gear and bearing Pullers.②522 - Suitable for using on any cap screw up to 1/2 inch diameter.③7393 - Perfect for removing timing gears, fan pulleys, harmonic balancers, and many other parts having tapped holes. Benefits 8056 Shaft Protector Inserted between the end of the puller screw and the shaft. Designed to protect shaft centers from distortion when extreme pressures are applied with either Grip-O-Matic pullers or Push Pullers. The sturdy steel design ensures long-lasting performance. Damage-free pulling. Ideal for servicing off-road construction equipment and machinery. Replace OEM .