The SQS Removable System is very easy to use, endowed with a security block. It also has the rotating plate system which, where applied, permits you to make your accessory positionable. To obtain this you have to tighten or loosen the screw in the center of the plate.
This system is in two parts, the male part is always applied to the holster while the female part to the accessory like Belt Loop Lower Position or Leg Plate. It is a great accessory and allows you to quick switch from one to the other operating system.