Gold Sovereign X5 Combo Wire & Comb Binder2 in 1, The X5 is both a comb and 3: 1 pitch wire binding machine, so for the day to day documents you may need to edit then comb is a great solution, for a more permanent document wire binding can create a professional document that is more difficult to edit, simply chose your binding method by sliding the selector and the X5 is ready to use, both the wire closer and the comb opener are built into to the X5 so it really is an all round solution for