Keeps tether cables connected and secured to camera when you are in tethered shooting. Two horizontal grooves and two perpendicular grooves accept thick, medium or thin cables (up to 6mm or 8mm). Comes with a ¼-inch thumb screw, it is used to install the cable clamp on cameras. The ¼-inch threaded hole on the thumb screw is used to connect with your quick release plate for tripod. 40 x 20 x 13 mm / 1.57 x 0.79 x 0.51 in. Weight: ~ 21 grams