The Zwilling J.A. Henckels Four Star Deluxe Sharpening Steel is designed to realign knife blade edges. Simply hold the steel point down on a table or cutting board, at an angle between knife and steel of 20°, pull the knife down and across the sharpening steel in a slight arc. Alternate between right and left sides of the knife 3 to 4 times. The magnetic rod will hold small particles removed from the knife blade. Made in Germany with a lifetime warranty.