The popular 18G, Surebonder 55916, Heavy Duty 9/16" Leg Length Staples, .417" Heavy Duty Narrow Crown Staples (Arrow T50 Type) are a must for the homeowner, not only for its many uses, but it will accommodate many staplers and staple guns. For use in the following models: Surebonder 5690 Triggerfire, Surebonder 5600 HD 3-in-1 Stapler, Surebonder 5685 HD Professional/Contractor Gun, Surebonder 5800 HD Hammer Tacker, and Surebonder 9600A Pneumatic Narrow Crown Stapler. Other models include Arrow T50, ET-50, ETC50, ETF50P, T55; Stanley PHT150, TR100, TRE500, TR100HL, TR200, TR60; Powerfast (Swingline) 31690, 31890; Ace Hardware 2014413; Craftsman 68514, 68517, 68492, 68515; Black & Decker 5700, 2000E, 3000E, and 4000E. There are 1,250 staples in a box.