Cangshan S Series 59656 6-Piece German Steel Forged Knife Block Set Patent Pending Design knives that focuses on ergonomics handle Petent pending cutting edge designed solid Acacia wood block works with the knives tastefullyevery block is hand crafted and has its own unique grain X50Cr15MoV German Steel with HRC 58 +/- 2 on the Rockwell Hardness Scale 6-piece knife set includes 8-inch chef's, 7-inch Santoku, 8-inch bread, 5-inch serrated utility, 3.5-inch paring and block National Sanitation Foundation(NSF) Approved