T50; 3/8-in Heavy-Duty Staples (5,000-Count) Works with Arrow stapler models: TT50, T50X, T50RED, ET50RED, T50ELITE, T50, T50PBN, ETF50BN, ET501, HT50, HT55, 5700, 8004 Also works with Craftsman, Stanley, PowerShot, Black & Decker, and Ace staplers Arrow T50 3/8-in Heavy-Duty Staples (5,000-Count)