These strong steel and composite CVD Diff Outdrives are ultra-reliableFeatures:Strong steel for hard-wearing durability and consistent performance on all terrains - Precision manufactured to provide a smooth and friction free axle operation in all conditions - Molded-in composite inserts for durability - Spare part for AR310893 CVD Slider SetIncludes:2 x CVD Diff Outdrive 2 x M4 x 4mm Set Screw