Features & Benefits: Material: Steel Finish: Black Installer Style: Threaded Thread: 7/16-20, 7/8-14 1/2-20 Made from High-Quality Steel Makes Installing The Balancer Simple Just Thread Proper End Into Crankshaft and Rotate the Nut Pressing Bearing Against Balancer 1/2-20 & 7/16-20 Threaded Ends Not To Be Used For Removal - Installs Only For the Following Cars： For Small/Big Block Chevy Cranks For Chevy 66515 SBC , BBC Package Including： 1 *Proform Harmonic Balancer Tool Notes： .
