Drilling into concrete, stone and other forms of masonry requires quality tools. And the use of a hammer or rotary hammer drill requires quality accessories, for longevity and effectiveness. Don't waste time or money on inferior attachments. See Allfasteners, for the most robust and effective hammer drill bits and accessories. Allfasteners stock bits made from the highest quality materials, from reputable manufacturers. And not satisfied with merely supplying, we are also always on the lookout for innovations in products that help you get the job done better and easier, like the market-leading 6-cutter SDS-MAX carbide drill bit.