(1) This pair of steel front + rear center shaft can be adjusted within the distance from 95mm – 105mm and 123mm to 138mm suitable for different wheelbase set up of the SCX -10 II (2) This pair of steel front + rear center shaft is made of harden steel with a black nitrified treatment keeping the color and surface elastic.(3) They run very smooth and can greatly improve the driving experience of the SCX-10 II jeep Cherokee in rocky crawling track.(4) We apply the steel wire ring to secure the joint.(5) We include stainless steel screws with this product offering a premium package. (6) We offer delivery to worldwide and welcome for dealership discussion