Specification Brand : BORDSTRACT BulletPoint1 : Durable Construction - Meticulously crafted from high-quality iron with a premium plating, these universal joint shaft couplings exhibit exceptional durability. They promise extended longevity and robustness, ideal for a variety of DIY projects. BulletPoint2 : Seamless Motion Transfer - Engineered for smooth motion transmission between inclined axes, these couplings ensure fluid connectivity. They enable precise steering mechanisms and efficient motor linkages, crucial for enhancing the operational functionality of diverse DIY creations. BulletPoint3 : Adaptive Versatility - Versatile in their application, these couplings serve as pivotal components across a spectrum of projects, acting as indispensable connectors for transmitting rotational motion. Their adaptability makes them suitable for a broad range of model-making endeavors, from intricate model cars and ships to complex robotics projects. BulletPoint4 : User-Friendly Installation - The set includes four universal joints, complemented by set screws and a hex key, simplifying the installation process. This user-friendly feature makes them accessible and convenient for hobbyists and enthusiasts engaged in various DIY projects. BulletPoint5 : Consistent Performance - Engineered with precision and quality, these shaft couplings ensure consistent and dependable performance. Their ability to maintain reliability in motion transfer significantly enhances the functionality and operational fluidity of DIY models and creations. Color : Inner Diameter 3*4mm FinishType : Finish IncludedComponents : Product Manual ItemName : Bordstract Steering Universal Joints, 4Pcs Universal Joint Shaft Coupling Kit Versatile Connectors for Rotary Motion Transmission Model(Inner Diameter 3 * 4mm) ItemPackageQuantity : 1 ItemTypeKeyword : pin-and-block-universal-joints Manufacturer : BORDSTRACT ModelNumber : DGBV204898 PartNumber : BORDSTRACTafmyu3g4q5-02 ProductDescription : Specification: Material: Nickle plated iron Inner Diameter: 3*4mm Length: 23mm / 0.9in Outer Diameter: 9mm / 0.4in Weight: 32g / 1.1oz (approx.)