Fotga QR Quick Release Plate for Tripod Sony D580rm D680rm CX-888 CX-460 Velbon QB-4W Quick release plates attach to the tripod mount on your camera and allow you to quickly and easily attach and detach your camera from a compatible tripod head Extra quick release plates allow you to conveniently swap out more than one camera with the same tripod Bottom Size: 44mm(1.73") x 44mm(1.73") Size: Length 66mm (2.6") x Width 52mm(2.05") 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