These are the Front Knuckle Arms for the Duratrax 835B Buggy, DTXD72**. FEATURES: Aluminum construction INCLUDES: Left Front Knuckle Arm (key #13) Right Front Knuckle Arm (key #14) REQUIRES: Four 8x16mm Ball Bearings, DTXC1585 jxs 08/17/12 ir/jxs