Calumet CK7800 Heavy Duty Professional Tripod with Built in Spirit Level for Quick and Easy Leveling on Uneven Terrain This heavy-duty professional tripod provides solid camera support for all camera formats up to 4 x 5" (10 x 13cm). Features three-section legs with convenient quick-release leg locks for fast setups, an adjustable center-brace for symmetric or asymmetric setups, and retractable rubber/ spiked feet for different types of surfaces. A crank handle gears the center column and prevents rollback. The 7800 is also topped off with a 3/8" tripod-head mount that will accommodate a wide range of different tripod heads. Also built into the tripod is a spirit level for quick and easy leveling on uneven terrain and a screw socket for attaching a carry strap.