Victorinox Boning Knife, Black Handle 15cm: Victorinox Boning Knife, Straight 15cm Blade: Ergonomic Precision Boning Knife. Whether you’re a butcher, a chef or an everyday kind of cook, the Fibrox professional line of Victorinox knives delivers the precision and efficiency of the restaurant kitchen to your home. Combined with a sharp 15cm blade in length, the non-slip handle of the Fibrox Boning Knife has been ergonomically designed so that cutting without resistance and separating meat from the bone becomes a simple, swift task.