Simpson 1 4 in. x 14 in. SDS Plus Carbide 2 Cutter Head Drill Bit MDPL02514 Rebar Standard Indexable (Throwaway) Design Standard Indexable (Throwaway) Design the square 14x14x2mm profile conforms to the HW K1920 standard for reversible throwaway knives Designed specifically for the complexities of Type III residential construction the top flange configuration and back to back compatibility on 2x6 (minimum) walls address the real framing challenges of multifamily fire wall assemblies SDS Plus Carbide 2 Cutter Head Drill Bit is a premium quality this bit clears the depth requirements common in anchor installation and through fastening applications without the need for extensions