(Click to enlarge image) With over 200 standard knife profiles, your option for creating unique designs is unlimited. Knives come in 1” – 7” increments and are made of high-speed steel. Our customers report getting thousands of feet from their knives before they need to be sharpened when using clean, good quality wood such as oak. For cutting accuracy, our knives are ground in pairs using a surface grind method. This method sharpens the cutting edge of the knives without modifying the original profile. We grind down just enough material to achieve a sharp edge. In most cases, a set of knives will be able to be sharpened many times.