Unique Tetra-Teeth are clog-free and grind in both directions, it has three separate grinding sections for quick shaping and trimming, beveling or finishing, and spot grinding, the recessed coarse teeth contain the drywall edge, and the staggered teeth design prevents clogging and allows dust to collect in the handle for controlled disposal, the raised fine teeth are ideal for beveling or smoothing the drywall edge, and the side-rail teeth allow notching and detailed work. The sleek design, 7 inches long for fewer strokes to achieve the same results, the embedded elastomer grip on each side of the handle for sure-grip performance, and the chrome-plated Tetra-Teeth are for superior durability.