SDS Max Drill Bits are designed with a special shank, specifically made to drill holes in concrete. It uses a hammering action to help chip away at the hard concrete. SDS and SDS+ are used for smaller holes maxing out at about 1-1/2inch, but if you need bigger step up to the SDS MAX. Tool King stocks a great selection of SDS Max Drill Bits. Shop now for the best prices on the SDS Max Drill Bits you need, all priced to fit any budget.