50MM Crankshaft Pulley Removal Tool Used to Maintain The Harmonic Damper Pulley Position While Removing/Installing The Pulley Bolt On Many Acura and Honda Engine; 19 MM Harmonic Balancer Socket Could Be Used On Honda Engines That Use A 19mm Hex Pulley Damper Bolt Or Other 19mm Applications. Counter-Weighted Design Reduces Impact Losses Found In Conventional Sockets,So You Can Quickly And Easily Break Stubborn Bolts Loose. These Extra Strength Weighted Sockets Are Conveniently Compatible With A Standard 1/2 Inch Drive Impact Wrench. Made of Hardened Chrome-Molybdenum Steel With Great Heat Treatment Hardness Process, Extremely Durable And Solid For Long Time Use. The Two Parts Are Not Used In Combination. 50MM Crankshaft Pulley Removal Tool Used to Maintain The Harmonic Damper Pulley Position While Removing/Installing The Pulley Bolt On Many Acura and Honda Engine.