Features: 1. Suitable for 1/4 inch thread action cameras, mobile phone clips, and similar devices 2. 1/4 inch lock with anti-loosening design, secured by rotating disk; can be further tightened with included wrench 3. Fits a wide range of pipe diameters: 22–25.5mm and 30–32mm 4. Made from CNC-machined aluminum alloy for high durability and strength 5. Surface treated with sandblasting and anodizing for enhanced finish and corrosion resistance Product Name: 1/4 Inch Screw Bicycle Mount Clamp Product Dimensions: 50 x 50 x 19mm Main Material: Aluminum Alloy Finish: Sandblasted and anodized surface Color: Black / Black & Red Style Options: - A-Clamp Mountain + Wrench - B-Clamp Mountain + Wrench - C-Clamp Mountain + Wrench + Screw + Swivel Seat Package Contents: - 1 x 1/4 Inch Anti-Loose Bicycle Holder - 1 x Hex Wrench - 1 x M5 Hand Screw (included only in style C) - 1 x Three-Way Rotating 1/4 Inch Swivel Seat (included only in style C) Note: This package includes only the items listed above. Other accessories or devices shown are not included. Note: Slight color variations may occur due to lighting and screen display differences. Measurement error tolerance is +/- 1–3 cm.