Do it No. 4 Heavy-Duty Narrow Crown Staple is a reliable staple designed to fit a wide range of popular stapler models including Surebonder, Arrow, Black & Decker, Craftsman, Channellock, Duo-Fast, Master Mechanic, Stanley Bostitch, PowerFast, and Unifix. These staples feature a narrow crown width of approximately 10.7 mm and come in various leg lengths ranging from 1/4 inch to 9/16 inch, all packaged in boxes containing 1,250 staples. Whether you need staples for light or heavy-duty stapling tasks, this product provides consistent performance and compatibility with many brands, making it a versatile choice for professional and DIY projects alike. Model Number: 346753