Product Name : VITAVON Redesigned HD Steel CVD Shaft Set For Traxxas X-MAXX 1/5   Brand : VITAVON Color : Silver Green (Please select the color) Increased the dia of the shaft and made of 45# steel with hardened treatment , and increased the dia. of the pin from stock 3mm to 3.5mm. and the stub axle made of high quality Aluminum 7075. the driveshaft pin is 4mm. Sells as a pair, 2pcs.