This is the optional Pro-Line Front Hub Kit for the Traxxas Slash 2WD. FEATURES: Upgraded steering knuckles and C-hubs have two more camber link adjustment holes than stock knuckles and C-hubs Hardened steel kingpins and axles Camber link and steering link screws are held with locknuts INCLUDES: Four Front Hub Plastics Two Hardened Kingpins Two Serrated Wheel Locknuts Four Ball Bearings Two Axles Four M3 Locknuts Two Crosspins Four Shims Four M3x18mm Button Head Cap Screws COMMENTS: Compatible with the Pro-Line PRO-2 Clamping Hexes, PROC9700. jxs 02/19/13 ir/jxs