ITEM NAME:PU-40 Quick Release QR Plate For J1 N1 Tripod Ball Head Arca Swiss 1/4" OZ Features: Safe Screw installed in both side to prevent drop of camera by accident. You can change the location of the screw to fit different cameras. The PU-40 Universal Quick Release System has been designed to be compatible with other brand quick release systems. Suitable for most ball heads. Built with excellent materials, offering outstanding quality. Specification: Material: Metal Alloy Color: Matt Black Length: 40mm/1.57'' Width: 38mm/1.49'' Thickness: 10mm/0.39'' Mounting Screw Diameter: 1/4" Compatibility: Arca-Swiss Standard Compatible With: Fits for Benro, Arca Swiss standard ballheads and other compatible accessories Package Included: 1 x PU-40 Quick Release Plate 1 x 1/4 inch Screw.Fits for Benro, Arca Swiss standard ballheads and other compatible accessories. 1 x PU-40 Quick Release Plate. Suitable for most ball heads. Thickness: 10mm/0.39".