Stirex Ergonomic Kitchen Knives are used by professionals in the food industry as well as in general industrial applications. Stirex ergonomic knife handles are designed to allow a worker use of the larger muscle groups of the forearm and upper arm. The handle design also allows an improved power grip which can aid in the reduction of excessive grip force. The Stirex Ergonomic Kitchen Knives have Stainless steel blades and are machine washable.