Features 1、Universal Compatibility: Easily convert 5/8-11 female threads to M14 male threads, making your core drill more versatile and compatible with a wide range of diamond core bits. 2、High Quality Materials: Chemical black coating on the surface of core drill bit extension for rust protection. High quality steel, strong and long life. 3、Enhanced Drilling Efficiency: Improve the performance and precision of your core drill with this essential accessory. 4、Safety and Stability: Ensure your drilling tasks are safe with a secure and stable connection. 5、Ideal for Use with Diamond Core Bits: Specifically designed for optimal compatibility and performance with diamond core bits, ensuring superior drilling results in various materials. Specification Features: Universal Compatibility: Easily convert M10 female threads to M14 male threads, making your core drill more versatile and compatible with a wide range of diamond core bits. High Quality Materials: Chemical black coating on the surface of core drill bit extension for rust protection. High quality steel, strong and long life. Enhanced Drilling Efficiency: Improve the performance and precision of your core drill with this essential accessory. Safety and Stability: Ensure your drilling tasks are safe with a secure and stable connection. Ideal for Use with Diamond Core Bits: Specifically designed for optimal compatibility and performance with diamond core bits, ensuring superior drilling results in various materials. Specifications: Type: 5/8-11 to M14 / M10 to M14 / M14 to 5/8-11 / M14 to M10 (Optional) Material: Alloy Steel Item Size: 42 * 22mm / 1.65 * 0.86in Item Weight: 60g / 2.11oz Package Weight: 76g / 2.68oz Package Size: 6 * 5 * 3cm / 2.36 * 1.97 * 1.18in Package List: 1 * Core Drill Bit Adapter Package List 1 * Core Drill Bit Adapter