The Klinch-Pak KP-P50-777 heavy duty pneumatic plier stapler drives 777 series 1/2-inch crown staples from 3/8-inch to 5/8-inch in length. This lightweight and well-balanced plier stapler is designed for high volume continuous use. It features include a 6-inch throat anvil and hook loop for overhead or mounted applications. The KP-P50-777 can securely fasten up to two thicknesses of double-wall corrugated and is excellent for trays, lids, end caps, bedding, container inserts, headers and bags.