Level 3 Serpa Duty HolsterLevel 3 retention holsters have long been the standard for law enforcement duty use. Now, thanks to the proven SERPA Auto Lock technology, you can draw your weapon rapidly under stress, using your natural drawing motion with no unnatural maneuvers or complicated sequences to remember. Just grab and draw! Passive retention detent adjustment screw and SERPA Auto Lock release Thumb activated Pivot Guard for additional security No thumb break or awkward