Features: Available from 1/4"-20 external thread to M4, M5, M6, M8, M10 external thread. Aluminum alloy material, smooth surface, strong and durable, wear-resistant and corrosion-resistant, not easy to rust. CNC processed, finely trimmed without burrs, increases friction, making screwing easier. Wide range of applications; compatible with projector bracket adapters, photography accessories, PTZ camera tripods, and more. Smooth threads allow for easy installation and disassembly. Specifications: Material: Aluminum Alloy Type: A24 / A25 / A26 / A27 / A28 (Optional) A24: 1/4" Male to M4 Male A25: 1/4" Male to M5 Male A26: 1/4" Male to M6 Male A27: 1/4" Male to M8 Male A28: 1/4" Male to M10 Male Quantity: 2 Pieces per set Package Includes: 2 x Conversion Screws Note: Due to manual measurement, please allow a slight variation of 0-1 cm. Due to differences in monitor displays, the actual color of the item may vary slightly from the image.