Another way to insure that you do not cut your hand with the Sharpmaker is to use a Quick Clamp and clamp it to the table or bench and this way you can hold and guide the knife using both hands. This has worked well for me, especially with large blades. It helps you hold the larger knives properly through the whole stroke. Small knives do not need this as much, but it does not hurt to have both hands guiding the blade through the full stroke. If both hands are holding the knife, you do not even need the guards to keep safe. My .02$ worth.