Masonry Drill Bits are manufactured in numerous shank sizes; including straight shank, SDS Plus shank, SDS Max shank, spline shank, and hex shank. In addition to different shank sizes, there are also different types of cutters. Some include 4-Plus, 4-Cutter, 3 Cutter, and 2 Cutter masonry drill bits. The main difference between these is the design of the cutter head. As you can see from some of our product pictures, we have featured the head of the drill bits as a way to show you the difference between the different styles of cutters. If you are not searching for drill bits, have no fear! We have tons of different types of cutters, chisels, and other specialty bits to help you finish specialized jobs such as asphalt cutting and floor scraping. Whether you are drilling into concrete, or using one of our specialized chisels, Power Tools .us has the answer for all of your concrete drilling needs.