• Accessory Mount with Double Ball-Joint Head for Panning, Tilting, and Rotating
• Standard 1/4"-20 Thread

CRL Wood's Powr-Grip® Vacuum Cups with the Knucklehead Mount allow attachment of cameras, scopes, and camcorders with standard 1/4"-20 threads using a Bogen Manfrotto® Model 155 Camera Mount. It mounts photographic umbrellas in screw-down side receptacles as it provides a reliable, temporary vacuum mount without drilling holes. It attaches to most flat or curved smooth, non-porous surfaces. The red-line indicator warns the user of any vacuum loss, and the check valve allows you to re-pump without losing any of the remaining vacuum. Lift tabs on the vacuum pad edges allow instant release from the surface. Supplied with a vacuum pad protector.