The Cangshan Cutlery 1024647 Thomas Keller Signature Collection Diamond Coated Honing Steel helps restore a knife's sharp edge by smoothing and realigning the blade's cutting edge. The refined Thomas Keller Signature Collection by Cangshan is a model of precision and craftsmanship. Slim, sleek and exceptionally well-balanced, meticulously designed to elevate and augment the skills of the user. Chef Keller was instrumental in the design of this honing steel, rigorously focusing on every detail to ensure it performs flawlessly.