spiral coil binding

spiral coil binding,iron single wire,iron coil Spiral coil binding Iron single coil: Nylon coated,smooth and lustrous surface,strong adhesiveness,endure abrasion and humidity,be able to bear rusting ,eroding,and aging. Material: Innocuous material,which complies with the environmental safty standards of Occident. Pull: Stonge pull,stable shape and quality,low wastage. Specification:1/4"(6.4mm)----2"(50.8mm) Range: Notebook,album,calendar and so on.