1、APPLICABLE MODEL: RC differential locker spool is suitable for Traxxas Maxx X 1/10 RC car, you can replace worn or damaged original part directly for higher strength. 2、DECELERATION POWER: Differential locker is designed for more effective deceleration power, it can be used to change speed, provide lower speed and higher torsion. 3、IMPROVE PERFORMANCE: Differential locker spool effectively improves performance of your RC car, make your remote control car run smoother. 4、PRECISE SIZE: RC differential locker with precisely shape and size manufactured, can provide balanced driving and maximize differential performance of remote control car. 5、REPLACEMENT: Differential locker spool is made of excellent aluminum alloy and iron, has great wear resistance and high strength, ensures a longer life. Item Type: RC Differential Locker Spool Material: Aluminum Alloy, Iron Size: Approx. 54x31mm / 2.13x1.22in Applicable Model: For Traxxas Maxx X 1/10 RC Car 1 Set x RC Differential Locker Spool (2 Accessories In Total) 1 x Set Screw 1 x Pins 4 x Screws