Single Stack Tuckable IWB Mag Pouch. Fits 9mm, 40 Cal, 45 ACP. Lifetime Replacement Warranty IWB (Inside the Waistband) Tuckable Holster (You can tuck your shirt in.) Ambidextrous (Clip can be moved to RH or LH position.) Under the Belt (Clip is designed to sit underneath the belt for total concealment.)