This is a PS Products Holster known as the Belt Slide, model 035T.
Black Ambidextrous belt slide holster in genuine high-grade leather. Fits medium to large frame autos handguns: Glock" Sig" Beretta" S&W Autos - 9mm. 45 Autos and 1911. Slots to fit up to 1-3/4 inch belt with removable clip for wearing inside or outside waistband right or left or in the small of your back. Comes with belt loops and a removable clip.
Features:
Fits medium to large frame handguns such a 9mm and .45 ACP handguns, including 1911
Ambidextrous