It helps position your camera securely on the tripod head. The quick release lock prevents the camera from falling. The quick release system allows for easy and fast attachment and removal of the camera. Ideal for use with digital, 35mm, medium, or large format cameras, video cameras, binoculars, or scopes. Includes a 1/4 inch -20 threaded camera screw and video pin. The quick release plate can remain attached to the camera base, enabling quick mounting and dismounting without repeated adjustments to the threaded mount. Compatible with: PH-368 (PH368) -686 (CX686) C-600 (C600) D-600 (D600) -870RM (VCT870RM) Bottom interface size: 6.8 x 6.2 cm Color: Black Material: ABS Package Contents: 1 x QB-6RL Quick Release Plate Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.