Feature: 1. This quick release plate can be used as a replacement for Manfrotto 577, compatible for Manfrotto tripod. 2. Comes with one 1/4in and one 3/8in screw for your camera or camcorder mounting. 3. With both 1/4in and 3/8in screw holes at bottom for ball head, tripod or camera dolly mounting. 4. The base features horizontal \u0026 vertical three shooting gradienters for better calibration. 5. The quick release sliding plate is compatible with for Manfrotto 501PL and 501PL (long). 6. This quick release plate can be used as a replacement for Manfrotto 577, it is compatible for Manfrotto tripod. 7. It comes with one 1/4inch and one 3/8inch screw for your camera or camcorder mounting. 8. With both 1/4inch and 3/8inch screw holes at bottom for ball head, tripod or camera dolly mounting. 9. It is made of precise CNC machine with metal construction, sturdy and durable. Specification: This high-quality quick release plate can be used as a replacement for Manfrotto 577, compatible for Manfrotto tripod. It features different mounting options for your camera and tripod. Features: This high-quality quick release plate can be used as a replacement for Manfrotto 577, compatible for Manfrotto tripod. Comes with one 1/4" and one 3/8" screw for your camera or camcorder mounting. With two 1/4" and one 3/8" screw holes at bottom for ball head, tripod or camera dolly mounting. The base features horizontal & vertical three shooting gradienters for better calibration. The quick release sliding plate is compatible with for Manfrotto 501PL and 501PL (long). Features solid locking screw, safety pin & anti-skid pads on the plate, providing you quite reliable mounting of your camera. Made of precise CNC machine with metal construction, sturdy and durable. Specifications: Brand: Andoer Compatible: with for Manfrotto 577 Item Size: 9 * 8 * 1.5cm / 3.5 * 3.1 * 0.6in Item Weight: 247g / 8.7oz Package Size: 10.5 * 9.5 * 9.5cm / 4.1 * 3.7 * 3.7in Package Weight: 301g / 10.6oz Package List: 1 * Quick Release Plate Package List: 1 * Quick Release Plate