A staple is a fastener for holding loose items firmly to a surface; it’s a squared-off U-shape, with the ends pointed. It is found in the canting arms of Stapelton, temp. Henry VI [Bedingfeld 61]. The staple’s points are to base by default. See also crampon, nail.
The Order of the Golden Staple, of the Barony of Rowany, bears: Per pale vert and gules, a staple Or.
Steffan von Urwald bears: Sable, a staple argent.