Swingline S.F. 39 Heavy-Duty 1/2 inch Leg Staples, 90-Sheet Capacity, 5000/BoxHeavy-duty staples are stronger and sharper to punch through larger stacks of paper and deliver a secure fasten. Compatible with all heavy-duty staplers. Sharp chisel point pierces better and jams less. Staple Type: Heavy-Duty; For Use With: Swingline 39 and other Heavy-Duty Staplers; Leg Length: 1/2"; Sheet Capacity: 90.