Setting the bar high, Rhino Brand Axles are made from heavy-duty 4340 chromoly steel, one of the industry's strongest materials. With an excellent strength-to-weight ratio, Rhino Brand Axles are Built for Battle! These axles exceed expectations and deliver performance not found in OEM or other aftermarket axles. Each CV and Shaft is maximized for ultimate strength. Protecting each CV is a puncture-resistance TPE (Thermoplastic Polyester Elastomer) boot with a low profile clamp. Rhino Brand Axles spare no details and are packed with a synthetic grease to keep your CVs running cool each time you ride. Each axle is precision engineered to provide the ultimate balance of strength and longevity. Whether you're running monster tires, blazing high horsepower, or tackling gnarly terrain, Rhino Brand Axles are built to withstand the harshest of conditions.