This harmonic balancer installation tool is designed for use with Big Block and Small Block Chevy crankshafts. Made from high quality steel material. This tool makes installing the harmonic balancer simple and easy. Just thread the proper end into the crankshaft and rotate the nut pressing the bearing against the harmonic balancer. Sold individually. Backed by a limited 30 day factory warranty.Proform Fits Small and Big Block Chevy Crankshafts 66515Specifications: Feature/Benefit Designed for use with Small Block and Big Block Chevy crankshafts. Applications Chevy Small and Big Block Engines Category Tools Make Chevrolet Description_ABR Damper Tool Description_SHO Balancer Installer Description_INV Harmonic Balancer Installation Tool Description_DEF Harmonic Balancer Puller Description_ASC Harmonic Balancer Installation Tool Description_ASC Fits Small and Big Block Chevy Crankshafts Description_LAB HARM BALANCER INSTALL TOOL Description_DES Harmonic Balancer Installation Tool Description_DES Fits Small and Big Block Chevy Crankshafts Description_EXT Harmonic Balancer Installation Tool Description_EXT Fits Small/Big Block Chevy Cranks Description_EXT Made from Quality Steel Description_EXT Makes Installing The Balancer Simple Description_EXT Just Thread Proper End Into Crankshaft and Rotate the Nut Pressing Bearing Against Balancer Description_EXT Sold Each Description_MKT This harmonic balancer installation tool is designed for use with Big Block and Small Block Chevy crankshafts. Made from high quality steel material. This tool makes installing the harmonic balancer simple and easy. Just thread the proper end into the crankshaft and rotate the nut pressing the bearing against the harmonic balancer. Sold individually. Backed by a limited 30 day factory warranty.