The nice designed wire binding machine will help you to create professional proposals,use double wire binding your documents can lay flat 360 degree.
It's one of the best binding solution for your book binding.

Wire Binding Machine OBWYN383     
Pitch: 3:1
Punching up to 20 sheets           
Punch A4, A5, B5 format 40rings                               
40 Selectable pull pins
Binding documents up to 120 sheet (14.3mm)
Use double loop wire size from 3/16'' to 9/16''
Manual punching and adjustable margin from 2.5mm to 6.5mm
Metal Construction
Net weight: 17.5kg

We have 3:1 pitch wire binding machine for smaller books, 2:1 pitch wire binding machine for larger books and a combination machine. There's also wire binding machines that can do plastic comb binding. You can choose the manual twin loop wire binding machine or electric double wire binding machine or double loop wire closers from OBINDER.