Safariland 6360 Level III ALS Retention Duty Holster, Mid-Ride, Black, Plain, Glock 20, 21 Level III Retention, ALS (Automatic Locking System) secures weapon once holstered, also features the SLS (Self Locking System) Rotating Hood Low-Ride level Mid-Ride, this slim, compact design allows weapon to ride close to the body Simple straight up draw once all releases are deactivated 2.25" (58mm) belt slots Fits: Glock 20, 21 Level III Retention Holster with ALS (Automatic Locking System) and Hood Guard Mid-ride belt position with slim, compact design allowing weapon to ride close to body Simple straight up draw once all releases are deactivated Constructed from thermal molded SafariLaminate materials