21-PIECE MULTI-MATERIAL DRILL BIT SET
Tungsten carbide tip with Cobalt provides -maximum hardness & heat resistance reducing wearNegative ground carbide tip bores through -multiple materials clean and smoothlyUnique brazing process allows bit to withstand -temperatures up to 1800 degreesChrome vanadium steel body - extra wide flutesCuts masonry, metals, wood, plastics & more