U type nail is also known as u fence staples. U staple is a type of two-pronged fastener, usually metal, used for joining or binding materials together. Large staples might be used with a hammer or staple gun for masonry, roofing, corrugated boxes and other heavy-duty uses. LengthGaugeCount Per lb. 3/4"14143 1"9101 1-1/4"988 1-1/2"949 1-3/4"960