1、Applicable Model: This differential locker spool is suitable for Traxxas Slash Rustler 1/10 RC car, you can replace worn or damaged original part directly for higher strength. 2、Deceleration Function: Designed for more effective deceleration power, can be used to change speed, provide lower speed and higher torsion. 3、Improve Performance: This locker spool effectively improves performance of your RC car, make your remote control car run smoother. 4、Precisely Made: Precisely shape and size manufactured, can provide balanced driving and maximize differential performance of remote control car. 5、Excellent Materials: This differential locker spool is convenient to install and removal, 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 Straight Shaft Length: Approx. 48mm/1.9in Lock Cylinder Size: Approx. 20x15mm/0.8x0.6in Applicable for: For Traxxas Slash Rustler 1/10 RC car 1 Set x RC Differential Locker Spool (2 Accessories in Total) 2 x Set Screw