ALPEN MASONRY DRILL BIT LONG LIFE 12 X 150MM ALP11712LONG LIFE TUNGSTEN CARBIDE MASONRY DRILL BITS Size: 12. 0 x 150 90 mm Packaged: Qty 1 Range of application: Masonry drill bit type Long Life, milled flutes, for percussion and rotary drilling in concrete, brick and natural stone. Strengths Optimum attachement of the carbide tip in the core Profile milled as with SDS bits Robust core made of tool steels Milled flutes For percussion and rotary drilling in concrete, brick and natural stone Long life