Uniloc tripods use a curved centre bolt to link both their legs and their centre column.
The legs and the column can move independently, and much more rapidly than conventional tripods.
Until you get used to it, though, it's like trying to wrestle with a robotic octopus, but once you master it there's a good chance you'll never use a conventional tripod again.
The design means you can use the centre column as a horizontal or diagonal boom at any angle, and it takes just moments to set up.
The 'System' version has a multi-section column that can be assembled and reassembled using inset grub screws and an allen key. You can have a short column, a long column, an extra-long 'hinged' column.
Disadvantages? The two-section legs are long when folded and don't give the same height as the others when extended.