This slipper set is supplied pre-built and ready to install in your vehicleFeatures:Precision manufactured aluminum slipper hubs - Durable composite 57T 0.8 module spur gear for reliable power handling capability - Castellated slipper pads for assured location into spur gear - Stainless steel slipper plate - Molded composite lock nut holds the screw in place for consistent slipper setting - Supplied assembled and set, ready to install into your vehicleIncludes:1 x Assembled Slipper Clutch with Composite Spur Gear