This is a aluminum rear axle lock-out Set from Axial. These rear axle lock-outs improve ground clearance on the rocks, to Prevent hang-ups on the rear axle. These aluminum lockouts are made of strong lightweight 6061 aluminum, anodized black with a laser etched logo. They also currently offer class leading ground clearance over any existing product on the market for the AX10. Note: Requires AXI30421 to complete.