Surebonder 55116 #3 Staples, Arrow JT21 Type, Light Duty, 5/16-Inch Leg Length, .441-Inch Crown Staples, 1000 Staples per box. Surebonder staples will meet all of your stapling needs. Our staples are designed for use with Surebonder staple guns and many of the other top name brand staple guns. ANSI Z87.1 Always wear safety glasses.