A set of ceramic knife "2nd most resistant materials after diamond!" wow, this is advertising! I have never seen a diamond crack on a wooden board, but the blade sharpness has to be responsible. The knives cut rather well, handle all plastic leaves me in doubt about their longevity (dishwasher, cut, shocks) by cons, as always in the boxes, they sell us a peeler and I admit it is very unwieldy, does not cut as expected, short, useless!