The QS-70 is the practical quick-release system with a bayonet lock for easily switching tripod heads and other accessories on the tripod. An optionally mountable center column can also be placed on the tripod platform. The kit consists of a bracket and a quick-release plate that are attached to each other by a twisting motion. The base of the QS-70 set can be mounted on any 3/8 inch screw. Three screws prevent accidental twisting. The outer diameter of the QS-70 quick-release set is 70 mm, while the inner quick-release plate has a diameter of 52 mm. To allow for quick changes between different heads and/or center columns, additional quick-release plates (Q70) are available separately from us.