CRTDG,Staple,DUAX,3/4" Sold as 1000/BX. Duax staples are especially designed for the Heavy-duty Rapid Duax stapler. Special metal alloy provides ideal staple leg strength and tolerances for precision stapling. Each galvanized, heavy-duty staple fastens two to 170 sheets of 20 lb. paper. Staples come in strips of 100. Crown measures 1/2" wide, and leg length is 3/4".