The factor that has the greatest impact on a knife's sharpening angle is, of course, its intended use. A different edge angle is found in kitchen knives, while another is found in survival knives designed for heavy work. Kitchen knives usually have a derived sharpening angle of 15° to 20°. Folding edc knives 20-25°. Survival and bushcraft knives are factory sharpened to 25-34° per side. Remember, the smaller the sharpening angle (e.g. 15°), the better the blade cuts, but it is more fragile and prone to damage. An edge with a higher angle, e.g. 25°, will stand up to the bar much better, but for cutting a tomato into thin slices it may not work well.