Surebonder #4 heavy duty 1/4" staples. 1250 staples per box. Fits Surebonder models: 5690 5600 5685 5800 5850 Arrow T50 T55 T55C Stanley TR60 TR85 TR100HL Powerfast (Swingline) 10401 31890 Ace Hardware 2014413 Craftsman 68434 Black and Decker 5700. Use for window screens shades shelf lining plastic sheeting.