Features: 0.8" (20mm) of sliding travel within plate to optimally balance gear.Female 3/8"-16 & 1/4"-20 threads on bottom.Plate has 1/4"-20 & 3/8"-16 mounting screws?? in addition to anti-twist video register pin.2-Stage Safety Quick Release System.** This item is not manufactured by Manfrotto. It is 3rd party manufacture to compatible with Manfrotto.Specifications:Material: AluminumPlate: 501PL (Sliding travel of plate 0.79"/20.06mm)Attachment: 1/4" & 3/8" screws attachment typeBottom: 3/8" female threadAttachment 2: 1/4" female threadColor: BlackItem size: Approx. 9 * 7.5 * 2cm/ 3.5 * 3.0 * 0.8inItem weight: 258g / 9.1ozPackage List:1 * 577 Rapid Connect Adapter with 501PL QR Plate
