With the KS-123 Knife Angle Setter you set the exact sharpening angle for virtually any knife. In three easy steps, this patented and sophisticated solution lets you set the precise angle even on knives with tapered blades. It is self-adjusting for the diameter of the grinding wheel, and fits all Tormek machines with a universal support. The calculations to get the right angle is based on exact geometric measurements, so this analog angle setter is always correct. Setting the sharpening angle on your knife has never been easier and more precise!