Durable Metal Spinner Holder for 2-Blade RC Airplane Propellers This Folding Propeller Spinner Holder is specially designed for 2-blade RC airplanes and gliders. Crafted from high-quality aluminum alloy, it ensures a secure fit, excellent durability, and reliable performance for your RC aircraft. Key Features: Wide Shaft Compatibility: Compatible with motor shafts of 3.0mm, 3.17mm, 4.0mm, and 5.0mm for versatility across various RC models. Premium Material: Made from aluminum alloy, offering lightweight strength and resistance to wear and tear for long-lasting use. Folding Propeller Fit: Specifically designed to hold 2-blade folding propellers securely, ensuring smooth and stable operation. Multiple Sizes Available: Choose from a range of spinner sizes to ensure the perfect fit for your RC plane or glider. Specifications: Material: Aluminum Alloy Fits Motor Shafts: 3.0mm / 3.17mm / 4.0mm / 5.0mm Compatibility: Designed for 2-blade folding propellers Size Information: Refer to size chart and product images for details Package Includes: 1x 2-Blades Folding Propeller Spinner Holder (Metal Mount) Perfect for RC airplane and glider enthusiasts, this spinner holder combines durability and precision to optimize your flying experience. Choose the right size for your plane and elevate your RC adventures!