We are offering semi-automatic double wire binding machine obwc520 semi-automatic book & calendar skip binding, don't need to hang. Features:-it's automatic guidance of loops from the spool, automatic wire counting, cutting and closing;-comfortable change of diameters due to exchangeable closing bars, optionally available for each diameter;-with auto calendar hanger insertion unit option;-possible extensions: automatic double wire forming machines;-paper feeding mode: manual, don't need to hang;-handling of double wire: auto leading, cutting, inserting, closing by foot pedal;-it can bind up to 1000 books and calendars an hour, and up to five step skip binding;-it chiefly uses air to drive the machine, so it is easily and safely to handle.-when in binding, you just need to step the pedal once to bind one book or calendar, and then it will automatically do the other things.