Dewalt DW5436 Specifications: 7/16 Diameter 16 Usable Length 18 Overall Length Dewalt DW5436 Features: ROCK CARBIDE tip maximizes carbide surface contact for longer bit life Innovative tip that reduces walking and increases accuracy Four Flute cleans debris out for fast, efficient drilling Guaranteed to set up to 25-percent more anchors than other standard masonry bits Designed with three flats on the shank that prevent it from slipping back into the chuck, ensuring user safety Hammers through the hardest aggregate with minimal wear or breakage