Holster will fit Ruger LC9 1911 with 3 Barrel Colt Officer, Defender and New Agent Keltec P11, PF9, P40 Kahr PM9/40/45, MK9/40, P9/40, K9/40 Ambidextrous - Inside the Waistband - Black DeSantis developed the original Tuck-able holster in the early seventies and cataloged it as the IA holster. This is their latest addition in IWB nylon: the #M24 Tuck-This II. It s built from heavily padded 1050D black Ballistic nylon and lined with slick pack cloth. The widely adjustable belt tab can swing from cross draw to FBI-strong side carry. The tab allows the shirt to be tucked down in between the gun and trousers affording nearly total concealment. For this version of the Tuck-This II, DeSantis built a magazine pouch into the front holster spine.