The Wusthof 2 Stage Hand-Held Knife Sharpener is an easy alternative for maintaining your knife compared to using a steel or a whetstone. The hand-held sharpener has pre-set angles and perform the same task as a steel. The fine stage has ceramic slats to be used for regular maintenance. The coarse stage has diamond-coated abrasive wheels that will reset a dull blade. Use the fine notch for regular knife maintenance.