UM Tactical's Qualifier Holsters are handmade and constructed of Boltaron. Boltaron has a much wider temperature range before cracking under arctic cold or deforming under high heat, it also has an ultra-high impact resistance over Kydex. All our holsters are made in-house resulting in unmatched quality control. The user can easily and quickly convert from inside the waistband to outside simply by removing clip and installing the qualifier strap. The OWB Qualifier strap holds the holster tight to your body without sacrificing the manipulation of retention. Some models will use two retention screws.