The legendary Arrow T50 5/16 in. Leg x 3/8 in. 505 Galvanized Medium Crown Divergent Point 20-Gauge Steel Staples (1 250-Pack) is the perfect choice for light to heavy-duty stapling jobs. Like all Arrow staples the 505 staple is highly regarded and widely used for various professional and DIY applications thanks to several factors that contribute to their global popularity. Arrow. How it all comes together.