INDIVIDUAL MULTI-PURPOSE DRILL BITS Perfect for expert users (mechanics, contractors, metal workers, farmers, etc.) and home users who want a tough job done right.  Millner-Haufen multi-purpose bits work well with a variety of materials, so you don’t have to buy a different bit for each job.  Effective on: hardened steel, cast iron, concrete, brick, fiberglass, glass, granite, marble, porcelain, and ceramic.     Purchase with confidence ― Millner multi-purpose drill bits carry an unconditional lifetime replacement guarantee.  Key features: Ideal for penetrating hard/abrasive metals  Flat-ground to a 118-degree angle for added durability and higher turning rates  C-2 carbide construction ensures bits stay sharp and last longer Chrome vanadium shanks offer more durability and longevity than traditional HSS steel Large flute capacity minimizes clogging with easier debris removal High temperature tip braising allows the bits to handle higher heat levels Save time by drilling through concrete and rebar with the same bit Designed for use with or without hammer mode Download spec sheet