# Best Knife Sharpener for Fillet Knives: Boat, Dock and Kitchen Source: https://stoneandstrop.com/best/best-fillet-knife-sharpener Publisher: Stone and Strop. Picks are chosen from what each Amazon listing states, not from hands-on tests. Method: https://stoneandstrop.com/how-we-pick A fillet knife is thin and flexible, which changes what a sharpener needs to do. The blade bends if you press hard on a stone, so light, consistent strokes matter more than raw cutting speed, and a guide or preset slot helps keep the angle on a blade that flexes. Most fillet knives are ground somewhere around 15 to 20 degrees per side and dull quickly on scales and bones, so frequent quick touch-ups beat an occasional full session. On the water the sharpener also has to survive spray and fish slime, fit in a tackle box and ideally handle hooks. This guide compares six sharpeners for fillet knives by abrasive, angle control, hook groove and portability, from a $9 ceramic touch-up tool to a guided field kit. ## Picks ### 1. Work Sharp Guided Field Sharpener, Compact Travel Knife Sharpener Tool Work Sharp Guided Field Sharpener: diamond plates, ceramic rods, leather strop and 20 and 25 degree guides, with a hook groove on the ceramic rod. What the listing offers: - Angle guides keep a flexible fillet blade on angle better than freehand - Five abrasives from diamond to strop for a refined edge - Hook groove on the ceramic rod and a 3-year warranty Limits to know: - Guides start at 20 degrees, so it will not hold a thinner edge - Most expensive option in this guide by a wide margin ### 2. Smith's 50729 Deluxe Fillet Knife & Hook Sharpener - Portable Outdoor Tool - Multiple Sharpening Grooves - Line Cutter - Pocket Knives & Straight Blades - Lightweight & Durable - Fishing Hook Smith's Deluxe Fillet Knife and Hook sharpener: carbide coarse and crossed ceramic fine slots, multiple hook grooves and a line cutter, 3 by 3 inches. What the listing offers: - Built for anglers: hook grooves and a line cutter on the same tool - Coarse carbide for dull edges, ceramic for touch-ups on already sharp knives - Under 2.5 ounces, fits a tackle box or glove box Limits to know: - Preset angle of the slots is not stated in the listing - Carbide slot removes steel quickly on a thin fillet blade, use it sparingly ### 3. Cool Hand 4.5" Tapered Diamond Knife Sharpener Rod with Fish Hook Cool Hand 4.5 inch tapered diamond rods, one 320 grit and one 600 grit, with pocket clip and a groove for hooks and other pointed tools. What the listing offers: - Two rods, 320 and 600 grit, stated in the listing - Tapered shape also handles serrated and gut-hook blades - Pocket clip and very light weight for carrying on the water Limits to know: - Freehand rod, so holding the angle on a flexing blade takes practice - Lesser-known brand with a short, numbered listing ### 4. Smith’s 51176 Stainless Steel 2-Step Knife Sharpener | Yellow | Preset Coarse & Fine Slots | Outdoor Handheld Knife Sharpener | Fishing, Hunting, Filet, Pocket Knives | Portable Compact Keychain Tool Smith's 2-Step stainless steel pull-through: crossed carbide coarse and crossed ceramic fine slots in a metal frame with rubber feet, sold for fillet knives. What the listing offers: - Stainless steel frame stands up to a wet boat better than plastic - Coarse and fine preset slots, 3 to 4 strokes per the listing - Small, 2.56 by 2.64 inches, with a lanyard hole Limits to know: - No hook groove, so hooks need a separate tool - Preset angle is not stated on the product page ### 5. danco Fishing Fillet Knife Sharpener Puck with Coarse and Fine Surfaces danco fillet knife sharpener puck with coarse and fine surfaces, textured TPR grip and a 9 inch lanyard, for tabletop or handheld use. What the listing offers: - Coarse and fine sides for repair and touch-up - Grippy TPR body is easier to hold with wet hands - 5-year limited warranty against defects per the listing Limits to know: - Abrasive type and grit are not stated on the product page - Puck sharpening is freehand, no angle guide ### 6. Rapala Ceramic Sharpener Single Stage Rapala single-stage ceramic sharpener, a low-cost touch-up tool from a fishing brand for keeping a fillet edge keen between cleanings. What the listing offers: - Ceramic is gentle on a thin, flexible fillet edge - Very low price, easy to keep one in every tackle box - Single stage, so there is nothing to set or choose Limits to know: - Listing has almost no detail beyond the product type and weight - Single fine stage cannot restore a badly dull edge As an Amazon Associate I earn from qualifying purchases.