SERPA Auto Lock System provides a quick, natural draw with immediate security upon reholstering to increase officer safety Injection molded carbon fiber composite construction provides incredible strength No snaps or hoods to accidentally open, weapon stays secured until you decide to draw Ease of training, same drawing technique for undercover, tactical and duty Extremely light weight Fits Glock 20, 21, 37, 38 and SandW MandP .45 and MP Pro 9/40 Passive retention detent adjustment screw and SERPA Auto Lock release Thumb-activated Pivot Guard for additional security - No thumb break or awkward middle finger release to slow down your draw No snaps or hoods to accidentally open Includes angle-adjustable jacket-slot belt loop