Shun Ken Onion 7 Piece Bamboo Block Set Includes 4 3/8" Chef (DM-0510), 5" Serrated Utility (DM-0513), 6" Chef (DM-0508), 8" Slicing (DM-0509), 9" Multi-Purpose Serrated Slicer (DM-0505), Honing Steel, and Block VG-10 super steel blades are clad on each side with 16 microthin layers (32 layers total) of high-carbon steel, creating a variegated look reminiscent of a Damascus-style blade Half bolster design allows you to sharpen the blade from the tip to the back edge Honing Steel Features D shape PakkaWood handle; Rockwell hardness of 61; 16 Degree cutting edge Limited Lifetime Warranty