5 in. x 17 in. x 22 in. SDS-Max Carbide Rotary Hammer Core Bit for Masonry and Concrete DrillingCore bits with wave design go beyond the range of standard bits and allow smaller hammers to drill larger holes. SDS-Max rotary hammer core bits are carbide tipped with an integral shank for better power transmission. Maximum core size is 2-5/8 in. deep.