Freud's Carbide Forstner Bits bring a technical level of excellence not found in a standard high speed steel Forstner Bit. These bits will drill through a multitude of materials. Use to drill pocket holes, angled holes, overlapping holes and flat bottom holes. Best of all, these bits will not burn like a standard Forstner and will stay sharp many times longer. These bits can be sharpened by any reputable sharpening service who sharpens router bits.