The Universal Quick Release Plate with Knob from Acratech is an Arca-Swiss-Type plate for use with most camera models and compatible heads.
Features: Arca-Swiss QR clamp compatible Anodized thumb wheel for secure camera attachment Cork inlays for increased friction Mounting Thread 1/4"-20 Material Anodized 6061 T6 Aluminum Dimensions 1.6 x 1.5 x 0.4" (4.1 x 3.8 x 0.9 cm) Space between feet 0.87" (2.15 cm) Weight 0.32 oz (9.0 g)