Black &amp; Decker 16748 Bullet Rotary Masonry Drill Bit Set， 5-Piece<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Patented speed tip design penetrates surfaces quickly， drilling up to 2 times faster than competitive drill bits</li><li>Innovative flute design removes material faster for easier drilling</li><li>Efficient design drills up to 6x more holes per battery charge with cordless drills</li><li>Commonly used for drilling anchor holes when installing flag poles， mail boxes and running electrical conduit</li><li>Ideal in all masonry applications</li><li>Includes: 3/16 x 4-Inch Rotary masonry bit (1)， 1/4 x 4-Inch Rotary masonry bit (1)， 5/16 x 4-Inch Rotary masonry bit (1)， 3/8 x 4-Inch Rotary masonry bit (1)， 1/2-inch x 4-Foot Rotary masonry bit (1)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51k3yTeTLGL.jpg" noproxy>