ALS (Automatic Locking System) secures weapon once holstered; simple straight up draw once ALS is deactivated by thumb while obtaining shooting grip Slim and low profile design for improved concealment Low-ride design for ease of draw This holster is a concealment version of the Automatic Locking System (ALS) series holsters. Once the weapon is holstered, it ''locks'' into place, providing an extra measure of security from open top holsters. A straight up draw is used once the ALS is de-activated. It comes standard with the 567BL belt loop, for 1.5 in. (38 mm) to 1.75 in. (45 mm) belt widths. Suede lining helps protect the gun's sights and finish, SafariLaminate wraparound design with a tough STX finish. Gun fit: Glock 19 Glock 23 Glock 36