Max Torque Centrifugal Clutch is made in the USA. 3/4" Bore 12 Tooth Fits with #35 Chain Includes 1-3/16" Key Engages at 2200 RPMs The 12T, 3/4" Bore, Max Torque Centrifugal Clutch, #35 is a high-quality clutch designed to provide exceptional performance and durability. It features a 12-tooth design and a 3/4" bore, making it compatible with a wide range of engines and applications. The #35 chain size ensures reliable power transfer and smooth operation. With its centrifugal design, this clutch engages and disengages automatically based on engine speed, providing smooth and efficient power transfer. The Max Torque brand ensures that this clutch is built to last and can handle even the toughest applications. If you're looking for a reliable and high-performing clutch, the 12T, 3/4" Bore, Max Torque Centrifugal Clutch, #35 is an excellent choice.