This is the Axial AX30421 Straight Axle 6x104 50mm (2pcs)

REAR AXLE LOCK-OUT. Competition Level Upgrade.

Key Features:

• Improves ground clearance on the rocks. Prevents hang-ups on the rear axle.
• Plastic lockouts are made of strong composite material, and is very cost effective.
• 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.