So far I have only used it to create handles in a few cutting boards. With various bits and bushings you can alter the size of the opening to your liking. I used a flush trim bit with a top bearing after drilling out the majority of the opening. After rounding over the edges it fit MY hand very comfortably. I think there will be many uses for the slot makers as patterns and jigs always seem desired to streamline my work. Only issue is that it is not a solid template. There is a lip around the perimeter and each opening. Able to crank down enough pressure that the template wouldn't move but I would prefer a solid form. That's the only reason it got 4-stars. Functionality has been 5-stars.