An original Boyd product, Litho-Perf offset perforating rule remains the industry standard for reliability and high-quality performance. Litho-Perf is available in 6-, 8-, 12- and 16-tooth rules. Rule height selections from .0125 inch to .029 inch allow you to perform perforations on a variety of paper and card stocks for jobs such as direct response mailing cards, coupon booklets and tickets.