Features: Achieve seamless compatibility for your model motor with this accuracy engineered 3.17mm to 5mm metal shaft adapter, designed for secure connection between motors and various components while ensuring optimal power transmission. Crafted from wear resistant high strength metal, this conversion sleeve features a tool easy installation design that withstands frequent part replacements and maintains stability during high speed operations. Ideal for hobbyists who regularly upgrade racing cars, drones, or aircraft models, this adapter serves both beginners seeking easy customization and professional demanding stable performances enhancements. Perfect for competitive racing scenarios or model modifications, it ensures consistent power delivery during intense battles while solving compatibility issues across multiple motor brands. Engineered with general fitment for most motors, this strong shaft converter eliminates mismatched parts concerns and enhances your model acceleration efficiency in speed focused competitions. Specifications: Component : metal Size: about 5x20mm/0.2x0.47inch Package Includes: 1 set Motor Shaft Adapter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.