The 537 GLS Open Top Concealment Belt Slide Holster features Safariland's unique Grip Lock System (GLS) which automatically secures a handgun when holstered and releases it upon using the middle finger upon obtaining a standard shooting grip a more intuitive and safer release. GLS (Grip Locking System) secures weapon once holstered; retention is deactivated with the middle finger upon a standard shooting grip on the weapon Soft flexible holster body allows holster to mold around wearer Tension adjusment to customize tailor weapon fit to user preferences Fits 1.5" (38mm) belt widths