The Pocket Mag Holder has a universal fit for all single stack or double stack magazines and is compatible with Glock, Sig Sauer, Springfield, Ruger, Smith and Wesson, Taurus & Similar firearm magazines. Ambidextrous for use in a right or left pants pocket and designed to stay in the perfect position for a rapid one-handed reload. Constructed of lightweight grippy nylon material and angled to stay in the corner of your pants when removing a mag. Designed with padded sides to conceal the shape of the mag in your pocket making it the perfect way to conceal carry a spare mag.