The 'Original' design Keystone Dehorners made in USA are designed for use on mature cattle. They provide the greatest power where it is most needed, at the beginning of the cutting stroke. The cut is aided by extra long handles. The 'Flat shear' V Blades give a cleaner cut with less force needed. The eccentric gears on the tapered spindle provide immense leverage at the start of the stroke with increased speed at the end of the stroke. A well proven product that is built to last.