Honing steel is used to realign the micro edge of the knife. With Shun knives, the VG-10 cutting core is so hard that it stays sharp longer than other knives. Depending on how often you use your Shuns, you may wish to hone your knives only once a week or so. The Shun Honing Steel has a micro-ridged stainless-steel rod that is used to gently realign the knife’s edge. It features a premium moisture-resistant PakkaWood® handle with a built-in 16° honing guide to help you hone to the correct angle easily.