More and more of today's packaging is being designed with ease of opening in mind. National's Zipper Rule is designed to maintain package integrity through the distribution channel, yet provide a package that opens without need of knives or other tools.
Available in both serrated style for rotary dies and standard for flat dies, National Zipper rules can be ordered in a variety of styles (serrated shown) depending on the desired tear strength. Like all National products, Zipper rules come in "left hand" or "right hand" and can be customized to meet your specifications.
National Tear Edge Rules are sold in matching left and right hand sets in standard lengths of 30", 36" and 1 meter. Serrated Zipper rules are also available notched or curved in all standard diameters.