 But then there's an attachment that bolts on. Actually, there's no tool. It just locks into place. And it runs an even larger belt, and it's mostly exposed. It uses four different pulleys, but it's not a square shape. There's a section on those pulleys that is adjustable, that is set at a specific angle, or you can adjust that angle. And then the user brings the knife to the belt and puts the edge in contact with the belt.