Bostitch B8 Premium PowerCrown Staples feature a unique crown (peak) at the top of the staple that flattens when driven down during stapling. Forced outward, the legs are better supported by the stapler magazine throughout the drive, resulting in more stapling force and reduced staple buckling. Staples are made from superior-quality high carbon steel wire with finely chiseled points for maximum sheet capacity. They are compatible with Bostitch staplers (if stapling up to 45 pages): B8 Impulse 45 Electric (B8E-VALUE), B8 Xtreme Duty Plier (B8HDP), B8 Heavy-duty Plier (02245). Staples measure 1/2 x 3/8 in. 5,000 per box.