This is a replacement Arrma Kraton 8S BLX Gearbox Input Shaft, intended for use with the BLX 4x4 Kraton.
 
Features:
Durable steel for long-lasting performance in extreme conditions
Precision manufactured for consistent operation and ultra-easy servicing 
Includes a replacement M4 nyloc nut
Includes:
(1) Gearbox Input Shaft
(1) M4 Nyloc Nut