Top-Tooth Cutting Machine Model: Description: For making Japanese "Tri-Edge Teeth". The machine cuts the saw on the rotary table, so that each tooth is set at a slightly different angle. So that friction at the front end of the saw won't prevent the saw's forward movement, the front teeth are so profiled that each tooth points towards the handle. The middle and back teeth, on the contrary, begin to angle slightly towards the front of the blade providing greatly increased biting ability.