Yeah Racing UTB18 Capra Aluminum Front Steering Knuckle Set. This optional knuckle set is intended for the Axial UTB18 Capra rock crawler. Constructed from CNC machined aluminum these offer increased strength and precision over stock parts along with providing additional weight down low on the axle. With a hard anodized coating these knuckles will stay looking great even under harsh conditions. Package includes two out portal covers, one left and one right side knuckle and assembly hardware.