Details SALTWATER FLATS Straight Eye, Standard Length, Extra Strong, Needle Point, BN5X Finish (super corrosion-resistant black nickel) A new standard for flats flies, the S420 is the ideal hook to update and improve your version of any Gotcha, Charlie, Scampi, etc. A unique bend holds fish like a vie and our proprietary BN5X finish (up to 5X more corroision-resistant than standard black nickel) sets this hook apart.