Saber Knives Kitchen Utility Bundle with Accusharp Style Sharpener (7-Inch Santoku Knife) Each of our knives is hot-dropped forged, heat treated, then cryogencially frozen to temper the steel to a sweet-spot of 56.6 rockwell What makes saber knives unique is the ability for our knives to take a new edge or refresh via sharpening Saber includes an Accusharp like knife Sharpener anyone can use that can even sharpen knives with serrated edges Lifetime warranty against defects in materials and craftsmanship Professional grade cutlery