5kg Tornado Barbed Fencing Staples 30mm x 3.15mm - Stockfence Netting Wire Fasteners5kg Tornado Barbed Fencing Staples Barbed staples are a popular Tornado product. Used to secure fence netting or lines of plain or barbed wire to fence posts. They have 2 key features to ensure optimal performance: Slice point technology which forces the staple to splay out when driven into posts, this gives the staples more purchase. The barbs allow the staples to resist being pulled out even if the post dries and splits.