This is a high quality twist lock! It attaches by making small holes in your bag or wallet and then a slotted back place goes onto the back side and you fold the wings out to secure it. Then attach the metal pieces that will completely cover the hole you cut out. You will have a metal front and backside to cover the hole completely, then you will tighten the 2 included screws to hold it securely. Available in Nickel, Gunmetal and Gold finish. Locks measure 1 3/4″ wide and 3/4″ tall.