The 439-1 is a 12 inch (305 mm) flexible fish tape leader. This item helps guide 1/8" steel tapes through sharp bends. It features thread on the end of the fish tape in place of the swivel ball head with silver-solder joint attaches to any 1/8" x .060" steel fish tape to provide a slim profile that fishes farther, faster. The 439-1 features high-strength stainless steel cable used for reliability and long life and beveled edges on the leader reduce the possibility of hang-ups when pulling wire. Up to (6) #10 wires can be attached to the large pulling eye.