Features 1、Stainless Steel Material: Made of high quality stainless steel material, durable, more powerful in use, higher and more stable transmission effect, providing a satisfying using experience. 2、Main Function: Install the motor shaft conversion sleeve on the 3.175mm motor shaft and then convert it into a 5mm diameter hole. 3、High Performance: Due to rugged material, fine workmanship, and high accuracy, the adapter can maximize the power of the remote control vehicles. 4、High Power: Easy for installation and disassembly, can achieve more efficient power transmission system, able to obtain higher power strength. 5、Rich Content: There are 5 sleeves, 1 L socket wrench and 5 M4 set screws included in the package, the rich content can meet your needs to convert your RC car or repair the damaged part. Specification Item Type: RC Shaft Adapter Material: Stainless Steel Color: Silver Application: for RC Motor 3650, 550, 540 Pinion Gross Weight: Approx.9g/0.3oz Inner Diameter: 3.175mm/0.1in Outer Diameter: 5mm/0.2in Length: 12mm/0.5in Package List 5 x Sleeve 5 x Fixing Scerw 1 x Wrench