Welcome to Brand AMK - We company integrating R&D, production and sales more than 10 years, dedicated to research and upgrade various products,bringing you happiness. We produce various upgrades part for 1/10 1/24 1/18 RC cars, Steel Heavy Duty Drive Shaft Universal Joint Driveshaft for 1/18 RC Rock Crawler Axial UTB18 Capra Unlimited Trail Buggy Upgrade Heavy duty steel, CNC machined Advanced internal spline Universal joint structure, smooth operation Heavier and more durable than stock ones Fit 3.5mm output shaft Specifications: Material: Stainless Steel Universal Joint Diameter: 10mm Shaft Body Diameter: 8mm Hole size: 4mm Weight and Length: 24g 61.5mm 29g 78mm What's Included: 2 * Drive Shaft