Masonry Drill Bits - Carbide Tipped USA Made Drills 1/4" straight bit shank, 13" Overall Length. Masonry Drill Bits - Concrete Drills are Masonry Bits - Carbide Tipped drill bits - Concrete Bits - are sold by Bisco of Florida. Concrete Drills are Carbide Tipped drills engineered with wide flutes to provide fast dust removal in softer materials. Masonry Drills are Carbide Tipped Masonry Drill Bits USA Made and designed for drilling in brick, concrete, and sandstone. Masonry Drill Bits - Carbide Tipped Drills are brazed to tough steel bodies and are larger than the nominal drill size providing clearance for installation of anchor screws, expansion shields and toggle bolts. Masonry Drill Bits by Bisco of Florida are designed for use in Portable Electric Drills. Call 1-866-247-2635 for large order special pricing.