GRAPAS

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.

Length	Gauge	count per lb.
3/4"	14	143
1"	9	101
1-1/4"	9	88
1-1/2"	9	49
1-3/4"	9	60