The Rapesco Porpoise is a traditional all-metal stapling plier, ideal for packaging tasks involving jiffy bags, cartons, and tubes. With a rear spring-loading mechanism and comfortable ergonomic grip, this product has been designed to make light work of high-volume, heavy-duty stapling tasks. With a throat depth of 2.32", this stapling plier uses type 24 High-Capacity 1/4" and 5/16" or type 26 Standard 1/4" and 5/16" staples. Capable of stapling up to 45 sheets of paper at a time; for optimal results use Rapesco 1/4" staples for up to 20 sheets and 5/16" staples for up to 45 sheets. Backed by a 15-year guarantee.