Arca Rail Adapter Bipod Swivel Stud Style All Metal, Machining, Oxidation Treatment Arca head with a 3/8-16 threaded hole to directly mount the clamp on Apod/Monopod, and also comes with a 1/4-20 socket adapter. Swivel Stud Style Bipod Arca Rail Adapter Quick Loading Base with anti-slip locking function. Clamp Quick Release Plate Add a 1/4'' conversion thread to be directly connected to the ordinary camera. Integrated and adjustable. Specifications: Description: 100% brand new and high quality! All-metal materials, CNC precision machining, surface oxidation treatment It has a 3/8-16 threaded hole to directly mount the clamp on a tripod/monopod, and also comes with a 1/4-20 socket adapter. Quick loading base with anti-slip locking function. Add a 1/4'' conversion thread to be directly connected to the ordinary camera. Built-in spirit level and precision ruler. The jaw can be opened from 37mm to 42mm. It will fit any Arca style plate such as, RRS, ARCA--SWISS /KIRK/Wimberley/ MARKINS/ SUNWAYFOTO/ kangrinpoche/ BENRO/ SIRUI etc. Specifications: Material: Metal Color: Black Item Size: 50 * 12mm (Diameter x Thickness) Package includes: 1x Clamp for Q50 Quick Release Plate