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Step 1
Choose a fillet knife with a quality stainless steel blade. Not all stainless steel is equal—look for one that resists corrosion and rust.
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Step 2
Select a knife blade length according to the size of fish you fillet. Bigger fish require longer blades than smaller fish. Typical fillet knife lengths vary from 4-inches to 9-inches.
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Step 3
Look for flexibility in the knife blade. It's important when filleting in tight areas and around curves. The flexibility of a knife is based on the knife's thickness. The thinner the knife, the more flexible it is. Longer knives demand thicker blades for strength and will be less flexible than smaller ones.
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Step 4
Buy a fillet knife with a comfortable, secure handle. Fillet knife handles come in a variety of materials from rubber to wood. Rubber handles offer the best grip and thus are often safer than traditional wood handles which get slippery when wet.
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Step 5
Shop around for the best prices once you find a fillet knife you like. Most retail Sporting Goods stores carry fillet knives, but the best selection is found online. Websites like WorkingPerson.com feature a large selection of specialty knives at lower prices than retail.
