Use any brand or size of heavy duty staples! Never buy the wrong staples again with the Surebonder heavy duty all-in-1 staple gun. Uses any standard type heavy duty staples Surebonder no.4, no.5, no.6, no.11 heavy duty staples or Arrow T50, Powerfast, Stanley, Duo-Fast, Bostitch, Craftsman, Master Mechanic, Do-it, Ace Hardware, Black & Decker, and Unifix staples. Easy drop in staple loading. Viewing window lets you know if you need to load staples. Patent pending.