Enhance the performance and reliability of your mechanical projects with this high-quality Motor Copper Shaft Coupler set, designed to connect rigid rods and shafts with differing diameters seamlessly. Crafted from premium nickel-plated iron, these couplers deliver exceptional durability and a long service life, making them ideal for transmitting rotary motion in various model applications. Whether you are working on model cars, ships, robots, or intricate mechanical assemblies, these shaft couplers provide a secure and stable connection that ensures efficient power transmission. Key Features: · Premium Nickel-Plated Iron Material: Ensures robust durability and resistance to wear, extending the lifespan of each coupler. · Versatile Shaft Connection: Effectively connects shafts or motors with different diameters, enabling smooth transmission between components with inclined or aligned axes. · Wide Compatibility: Perfect for various model applications including remote control cars, ships, robots, and other mechanical projects requiring precise rotary motion transmission. · Reliable Rotary Motion Transmission: Designed specifically to connect shafts transmitting rotary motion, facilitating stable and efficient operation. · Multiple Sizes Included: Comes in three sizes—3.0-3.0mm, 3.0-3.175mm, and 3.0-4.0mm—to accommodate a broad range of shaft diameters for versatile usage. · Lightweight and Compact: Weighing approximately 39g to 41g per pack, these couplers are easy to handle and install without adding significant weight to your assemblies. Specifications: · Material: Nickel-Plated Iron · Types and Weight:  - 3.0-3.0mm (41g/1.5oz approx.)  - 3.0-3.175mm (41g/1.5oz approx.)  - 3.0-4.0mm (39g/1.4oz approx.) Package Includes: · 5 x Motor Copper Shaft Coupler (3.0-3.0mm) · 5 x Motor Copper Shaft Coupler (3.0-3.175mm) · 5 x Motor Copper Shaft Coupler (3.0-4.0mm) This Motor Copper Shaft Coupler set offers a dependable and versatile solution for connecting motor shafts and power transmission components in a variety of model and robotic projects. Its premium construction and precision design ensure smooth rotary motion and lasting performance, making it an essential accessory for hobbyists and professionals alike.