Calphalon Recalls to Repair Contemporary Cutlery Knife Block Sets Due to Laceration Hazard. The tips of the 8 - inch slicing knife and / or the 8 - inch bread knife can protrude through the bottom slot row on the wooden block holder, posing a laceration hazard. This recall involves all 17- and 21 - piece Contemporary Cutlery Knife Sets with model numbers KNS17C and KNS21C. The knife sets were manufactured from August of 2007 through May 1, 2011. The recalled cutlery sets do not have model or date code markings on the wooden block although all sets have the""Calphalon" logo stamped in black on the front. Knife block sets with a three digit number imprinted on the underside are not included in this recall.