PATIKIL Brass Shaft Coupler – 3mm to 5mm, 4-Pack

The **PATIKIL Brass Shaft Coupler** is a durable, high-torque transmission joint designed for precise mechanical connections in RC models, motors, and robotics. Made from corrosion-resistant brass, these rigid sleeve adapters ensure long-lasting performance while maintaining shaft stability and alignment. Each coupler features a **3mm to 5mm inner diameter range**, seamlessly accommodating shafts of varying sizes, and includes **M3 screws** for secure fastening.

Ideal for applications like RC cars, airplanes, boats, and robotic systems, these couplers provide a tight, non-flexible fit that eliminates eccentricity—perfect for demanding drive systems where accuracy matters. The set includes **four couplers and eight screws**, offering versatility for multiple projects. Whether you're assembling a custom RC vehicle or upgrading a motor setup, this brass adapter delivers reliability with minimal inertia and maximum sensitivity.