hot racing scxt125r unibody super hd steel differential lock ar44 hot racing hot racing optional super heavy duty solid billet steel front or rear differential (diff) locker (spool) for the 1/10th scale axial scx ii with ar44features: - cnc machined solid billet steel- compatible with the front or rear differentials- replaces stock casting locker diff case for extreme durability- black oxide finished for corrosion protectionyou will receive: - one (1) locker spool (gear not included)- four (4) m2x6mm ring gear mounting screwsrequirements: - recommended to use a removable-type locking adhesive on screws threading into metal- do not over tighten hardwarecomments: