Evolution Features The Evolution Series is a passive retention holster that includes a retention adjustment screw. The tension screw is not pre-set and allows for retention pressure to be adjusted based upon personal preference. When un-holstering do so in a deliberate and rapid upward motion. Passive retention is automatically engaged upon re-holstering. Evolution Specifications Passive retention one-piece holster body construction Retention adjustment screw with passive retention Protected sight channel Low profile design for concealability Utilizes mini paddle Reinforced rivet attachment