Fuente: WIPO "tomato" A tool for interproximal reduction includes a handpiece and a substantially solid disk-shaped member. The hand tool has a motor coupled to a coupling member. The handpiece is for creating oscillating motion in an oscillation range of 90 degrees or less. The disk-shaped member has a front face and a rear face and defines two or more segments that are different from one another. Each segment has different properties comprising one or more of perforations, cutting surfaces, and abrasives. The disk-shaped member has a centrally disposed aperture for coupling to the handpiece with the coupling member. The properties only partially cover one or more of the front or rear face of the disk. The handpiece is configured to permit a user to position their fingers directly adjacent the dish-shaped member during operation of the handpiece.