3 - SDS Max 4" x 12" Carbide Tipped Core Bits Concrete Hole Saw Core Drill Bit $120.0 Brand Unbranded Type Core Drill Bit Bit Dia. 4 in. Drilling Lenght 12 in. Overall Length 12 in. MPN 4inCore Shank Type SDS Max Core Drill Arbor SDS Max condition New Carbide Concrete Core Bit 110mm& 120mm With the drive bit 12” core bit. Bits dimensions 4 3/4” & 4 3/8” set consist of one bit 4 3/4" & another bit 4 3/8" and one drive threaded bit 12"