All Balls Racing Rear Independent Suspension Kits contain everything required to rebuild the upper and lower A-Arm & Knuckle. Needle bearing shafts included are 52100 hardened and precision ground bearing steel, complimented with self-lubricating Acetal Nylon bushings for better wear and performance. All metal bushings are case hardened and plated to prevent wear and corrosion. Knuckle only repair kits are available for purchase separately. Kits are sold per side.