Victorinox 41981 Steel 7-1/2" loose ring continental cut white handle A Steel sharpener also known as a honing steel is the best knife sharpener to use on a daily basis for your kitchen knives. Even though all polypropylene handles are dishwasher safe, hand-washing is recommended to prolong the finish of the handle. Durable polypropylene handle is NSF approved and dishwasher safe. Handle With Hang-tag.