The Leofoto GC-364C Geared Center Column for 75mm Bowl Tripods is a center columns specifically designed for 75mm bowl tripods to add additional height. Made of brushed, hard anodized aluminum for strength and durability, the GC Series center column features a rapid column design with a large butterfly twist lock collar. With the folding crank handle, the geared vertical movement is precise with many adjustments that can be made. Both the column base and top feature a reversible 3/8"-16 threaded mounting stud that can be unthreaded and flipped to reveal a 1/4"-20 threaded mounting stud, making it compatible with virtually any head.