We have the medium and small leather backers for those that want the full coverage behind their gun next to their body. The medium is for the full size to sub-compact and the small is for the compact to pocket size. We can go ahead and attach it to your holster or or you can drill the 1/4" holes and mount it in your desired location. We include the mounting hardware to attach it to the existing holes in the holster. The leather backer adds a smooth feel to your body and can be worn comfortably all day. If you order the leather backer attached it will come to you attached set up in the IWB - in the waistband position in whatever hand carry you ordered.