Built-in bubble levels ensures the accuracy of vertical or horizontal photography. The levels and nonslip rubber pad ensures balanced, stable and safe use. With 1/4inch and 3/8inch screw holes, it can be easily installed on a tripod with 1/4inch or 3/8inch screws. 480mm long and long quick release plate, 38mm wide, for standard fixture. Craft from wear-resistant aluminum alloy, can be used for long terms ;