The blade is sharpened to a chisel bevel. True skating emerged when a steel blade with sharpened edges was used. Straight razors consist of a blade sharpened on one edge. The upper inclined portion of the blade may be sharpened. By contrast, knives are generally sharpened much less frequently. At first the blade is sharpened on a grinding wheel. The blade is only sharpened on the outside portion of the curved end. The jigane allows the knife to be sharpened more easily and absorb shock. The blade was sharpened only on the inside and was reputed to be devastatingly effective. After the sword was polished, the fine tip could be sharpened. Edges were often sharpened by further retouching. She has sharpened and elongated canine teeth with hollows inside them. Disposable safety razors can be sharpened using various methods. These are sharpened sticks placed vertically in the ground. Cut tree trunks were sharpened to create stakes.