Wide Applications Our predator engine clutch kit includes a washer and lock washer, compatible with predator 212 engines and most other 3/4 inch shaft engines, practical to use in your karts and other vehicles alike. Precise Size Our clutch bolt has a precise size that is nicely fit for the parts of your engine, this bolt secures your clutch to your crankshaft without the use of set screws, making it convenient to install and remove. Premium Material Made of stainless steel material, wear, and tear-resistant does not easily crack, peel, deform or fade, is rust-proof and corrosion-resistant, and has good hardness and thickness.