GPM Steel Adjustable Main Shaft With Alloy Body(Blue) – 14pc set #WR037SA-B

Major advantages of upgrading to this product :
Made by aluminum 6061 T6 + harden steel #45 universal swing shafts cross head design
Aluminum shaft body reduces the weight of the overall weight and hence battery life lasts longer
Universal swing shaft cross head design improves the steering angles hence the crawling angles can be greatly enlarged.