Purchased "Yoshiblade" after TV add, which made it sound like exactly what we were looking for; an all around effective knife that would last for a long time without need of sharpening. On receipt however we were very disappointed with product as the instructions for its use has more restrictions on what it can't be used for that what it can be used for. Things of course they don't tell you in their commercial. Buyer beware... this is not a good product and is not worth the money they get out of you.