ITEM NAME:Quick Release Plate Clamp for Ball Head Manfrotto 501HDV 503HDV 701HDV 577 Description: - Quick Release Clamp Compatible with Manfrotto 501HDV 503HDV 701HDV 577/519/561/Q5 - 1/4" and 3/8" dual screw threaded holes on the bottom makes it suitable for all tripods, monopods and ball heads - With gradienter and scale plate, convenient for use - Locking knob makes quick shoe plate more stable and prevent loosing and sliding - Holes in the adapter plate enable more connecting possibilities - Superior quality aluminum alloy is used to ensure a light weight but super high strength support. Specification: - Material: Aluminium - Size:55x39x15mm(LxWxH) - Model:QR-39U Package Included: 1xCamera Quick Release Clamp 1Set tools Note: Camera is not include.Quick Release Clamp Compatible with Manfrotto 501HDV 503HDV 701HDV 577/519/561/Q5. - Locking knob makes quick shoe plate more stable and prevent loosing and sliding. - Holes in the adapter plate enable more connecting possibilities.