Haoge HDY-55 55mm Universal Adjustment Tripod Monopod Leveling Base Ball Head with Offset Bubble Level for Canon Nikon Sony and Other DSLR Cameras This Haoge Leveling Base features a 55mm diameter base and a 1/4" screw at the top that supports cameras, Camcorder, Clamp, Panorama Head and Ball Head. 3/8" mounting hole and 3/8"-1/4" screw adapter at the bottom, for attachment to a tripod or monopod. The base features an offset bubble level to keep your horizons straight. Adjusts to +/- 12 (degrees).