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Product Description 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-inch deep. 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-inch deep.