IRC00001 - Steel alloy differential locker (1x) for AR60 (Wraith, Yeti, AX10 Deadbolt) axle or AX/SCX-10 axle by Incision.A simplified design replaces the stock Axial plastic diff cup and sintered locker with a one piece spool that reduces slop in your axles. Made from high quality US chromoly steel and heat treated for a durable and long lasting product at a great price. Compatible with Axial's Stock and Machined gear sets.