Trenro Qb-4w Quick Release Plate Replace for Velbon Cx-444 Cx-888 Cx-460 Cx-460mini Cx-470 Cx-570 Cx-690 Df-50 Sony Vct-d580rm Vct-d680rm Vct-r640 A quick release plate can be kept attached to the camera's base and allows the user to quickly and easily attach or remove the camera from the tripod without having to waste time fumbling with the threaded mount 1/4 inch tripod socket QB-4W: Length 66mm(2.6 Bottom Size: 44mm(1.73 Spare Quick release plate Suitable for Velbon CX-444, CX-888, CX-460, CX-460mini, CX-470, CX-570, CX-690, DF-50 SONY VCT-D580RM, VCT-D680RM, VCT-R640 Allows to set 2 cameras in one tripod. Removable quick-release plate. comes with 1/4&#034; screw. suitable for all SLR cameras. 3/8&#034; screw mount at the bottom. can be widely applied to various professional tripods. Length: 31cm Material: Aluminum Alloy Net Weight: 410g Maximum Load: 8kg Quick-release plate size: 65 x 51 x 20mm Quick release plates: Benro, Arca Swiss standard compatible