Whether at home on the job or hitting the range this right hand Twin Mag outsidethewaistband OWB holster provides allday comfort as well as security for your double stack magazines. The Twin Mag is constructed of injection molded nylon shell and rustresistant black oxide fasteners. An adjustable compression screw grants an extremely wide range of fit for double stack magazines while the FrameLock technology grants positive retention during even the most rugged use. It fits double stack magazines for most Glock handguns such as 9mm models G17 G19 G26 and G34 .40 caliber models G22 G23 G27 and G35 .45 GAP models G37 G38 and G39 and .357 SIG models G31 G32 and G33.