This is our elastic magazine carrier that slides onto a belt. It will fit most belts up to 1.75. You can use the accessory slot to carry an extra magazine, knife or tourniquet. The accessory slot also has our Sticky material to help hold smaller or smooth items in place. It is open ended so a variety of different sized items can be carried from a single stack .380ACP magazine up to a large double stack .45ACP magazine and everything in between.