Dewalt DW5249 Specifications:1" x 12" Carbide Drill BitDewalt DW5249 Features: ROCK CARBIDE tip maximizes carbide surface contact for longer bit lifeFour flute design cleans debris out for fast, efficient drillingThree flats on shank eliminate bit slipping in chuck (except DW5232, DW5233, DW5237, DW5238)