Revo 4wd Ssd Cv Drive Steel optional upgrade heavy duty splined star drive CVD axle kit for the front or rear of the NEW 1/10th scale E-Revo, E/MAXX, Revo 3.3, T/MAXX 3.3, and Summit. These shafts are compatible with vehicles that use the 5451X axle shafts. Please confirm that the vehicle uses these shafts before ordering. FEATURES: - Heavy duty CNC machined #45 hardened carbon steel construction - Replaces factory plastic front or rear drive axles - Blue anodized aluminum pin capture rings with rubber o-rings to prevent movement - Design eliminates CV pin setscrew - Steel is black finished YOU WILL RECEIVE: - Two (2) splined CVD shaft assemblies REQUIREMENTS: - Installation at rear drive assembly - Recommended to maintain CV joint and shaft spline with grease - Recommended to use a removable-type locking adhesive on screws threading into metal SPECIFICATIONS: - Approximate collapsed length: 151mm (5.9 inch) - Approximate full extension resulting in zero shaft engagement: 199mm (7.8 inch) COMMENTS: - Replaces factory plastic 5451X axle driveshaft assembly