Feature: 1. With several 1/4\" and 3/8\" screw hole, can be used with tripod, rail, stabilizer and different devices, for photography. 2. With 1/4\" and 3/8\" screws on QR plate, can easily attach your camera and camcorder on it. 3. Compatible for Manfrotto 501, 500AH, 701HDV, 577 head, etc. 4. Fast switching between different devices without replacing the quick release assembly. 5. Anti-slip rubber and stop pin on the QR plate, to protect your camera from accidentally sliding. 6. Made of aluminum alloy, very strong and durable. 7. With several 1/4in and 3/8in screw hole, can be used with tripod, rail, stabilizer and different devices, for photography. 8. With 1/4in and 3/8in screws on QR plate, can easily attach your camera and camcorder on it. 9. With several 1/4 and 3/8 screw hole, can be used with tripod, rail, stabilizer and different devices, for photography. 10. With 1/4 and 3/8 screws on QR plate, can easily attach your camera and camcorder on it. 11. With several 1/4inch and 3/8inch screw hole, can be used with tripod, rail, stabilizer and different devices, for photography. 12. With 1/4inch and 3/8inch screws on QR plate, can easily attach your camera and camcorder on it. 13. Made of aluminum alloy, very strong and durable. Compatible for Manfrotto 501, 500AH, 701HDV, 577 head, etc. Specification: The quick release adapter with plate is designed for camera tripod. Wide compatibility, this item works on any tripods with 1/4" or 3/8" screw. The special quick release assembly is also compatible for 501/ 500AH/ 701HDV/ 577 head, better to meet your needs. Main Material: Aluminum alloy Item Size: 12 * 9.4 * 2cm / 4.7 * 3.7 * 0.8in Item Weight: 263g / 9.3oz Package Size: 13.5 * 10.3 * 3cm / 5.3 * 4.1 * 1.2in Package Weight: 298g / 10.5oz . Package List: 1 * Quick release clamp 1 * Quick release plate