【Package】: 1x Threaded Pole, 1x Strong Nut, 1X Thrust Bearing, 1X Washers. Fits Small/Big Block Chevrolet crankshafts. 7/16 in.-20 and 1/2 in.-20 threaded ends. Proform offers specialty tools to make harmonic balancer installation easier. Just thread the proper end into the crankshaft, and then rotate the nut pressing the bearing against the balancer First, insert the thread pole into the proper position in the crankshaft; Then install the thrust bearing, washers and nuts in turn; Last, use a wrench to tighten the nut., Easy to Operate. ProForm Crankshaft Damper Harmonic Balancer Installer for Balancer Installer Tool 66515 SEBLAFF Harmonic Balancer Installation Tool Puller Crankshaft Damper Installer have a longer service life. MSCRP 66515 Harmonic Balancer Installation Tool Nepal | Ubuy Made of high quality steel, durability, anti-corrosion and anti-rust. Some lubricating oil Will be better to operate.