This is a replacement Tekno RC Differential Coupler, and is intended for use with the Tekno RC EB48 1/8 Scale Electric Buggy. This lightened and hardened steel coupler is also used on the Tekno RC V4 Brushless Kits on the rear differential holding the Tekno RC V4 Drive Axles (TKR450113R, TKR450513R, TKR450613R, TKR450713R, TKR450913R).