Black & Decker Accessories #16731 3/16x4 Bullet Mason Bit

3/16 x 4 , Bullet Masonry Drill Bit, Carbide Speed Tip, 1/4 Shank, Speed Tip Aggressively Penetrates Surfaces, Drilling Up To 2 Times Faster, Innovative Flute Design Removes Material Faster For Easier Drilling.