Benro PU-5060 Quick Release Plate II Anti-twist locking screws match the international standards employed by manufacturers of Arca-syle QR mounts (Acratech, Kirk, RRS, Wimberley and others). Universal Quick Release Plate: PU Series (Plate Universal) fit for all Digital Camera Superior quality imported aluminum alloy material is used to insure a light weight but super high strength support Advanced CNC (Computerized Numeric Control) machine systems provide an unprecidented degree of manufacturing presicion so parts feel and fit perfectly. Aluminum Anodized surface treatment assures years of corrosion and abrasion-resistant operation.