This Victorinox Kitchen?6.7836.7606.4US1?Utility Knife set? features a 4 in. and 3.25 in. stainless steel blades that are hand finished in Switzerland by skilled craftsmen. The blades do not stain or discolor. Victorinox knives are specially made to? be re-sharpened over and over again, keeping their edge just as sharp as the day you bought it. Made in Switzerland.