Product Description BOSCH SDS-max carbide-tipped rotary hammer core bits offer an integral shank for better power transmission. BOSCH SDS-max rotary hammer core bits with wave design go beyond the range of standard bits and allow smaller hammers to drill larger holes. Wave design transfers energy to bit more effectively for up to 40 percent faster drilling versus previous design. Amazon.com Core bits with wave design go beyond the range of standard bits and allow smaller hammers to drill larger holes. Bosch SDS-Max rotary hammer core bits are carbide tipped with an integral shank for better power transmission. Maximum core size is 2-5/8-inches deep.