Overview Reviews Product Description Bright finish Straight shank For drilling brick, stone, cement, concrete Clarkson Osborn Catalog Product Videos Custom Field Diameter 5/16" Flute length 3-5/32" Overall length 4-15/16" Package quantity/sold as each 10 Product Reviews Write a Review Write a Review × Clarkson-Osborn 5/16" Carbide Tipped Masonry Drill Bit DR52020 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *