OEM Swingline 3/8" heavy-duty staples, designed for optimal performance in select Swingline staplers, including the Optima 60 and 70 Sheet Staplers. These high-capacity staples feature stronger wire for easier paper penetration and reduced jamming. Each strip contains 125 staples, and they come in a reusable metal box. The crown width is 1/2" with a leg length of 3/8".