The Relentless™ Fillet Knife blade is made of relatively soft titanium which wears quickly like dentin. A strip of ultra-hard carbide or crushed diamond compound is bonded to the titanium base metal via spark and laser deposition. The carbide and diamond compound acts like the iron-fortified enamel on the beaver tooth, creating a differential hardness and resulting in a sharp perpetual edge that continually sharpens as you use it. This patented Perpetual Edge™ Technology is exclusive to Relentless and unlike anything else on the market.

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