Global 10in Diamond Steel has a diamond-honed surface to maintaining or re-aligne the knife's edge. Holding the knife at a 10-15 degree angle and making several strokes to both sides of the blade will quickly true the edge. The steel is carefully weighted and features the same distinct handle design as the knives. This 10in. steel is good for maintaining all your knives on a weekly or monthly basis, depending upon how often you use your knives.