This is a DeSantis Gunhide Belt Holster known as the 001 Thumb Break Scabbard, model 001TA21Z0.
The firearm rides high and is presented at an optimum draw angle. Its thumb break and exact molding" together with a tension device" allows for a secure and highly concealable carry. Belt slots are 1 3/4" wide. Some models with two belt slots and without tension device.
Features:
Features three belt slots so you can have either straight up or a forward draw
Most models feature a tension screw so it can be as tight or as loose as the user wishes
Comes with a thumb break
Rides high and tight to the body