Croch Fishing Crimping Set: Crimping Pliers + 300 pcs copper single barrel sleeves + 10M Steel Leader. It is an indispensable tool for every fishermen and angler who prepare their own shark fishing rigs and wire leaders. Rustproof and durable - Made of forged and hardened high carbon steel for resisting to corrosion, suitable for Fresh and Salt water. Strong pliers with individual pressure points make sure that crimps are tight and secure.