Carbide tipped drill bit head is harder and more resistant to extreme loads. 4 flute design for fast dust removal. For use in drills requiring SDS plus shanks. No. HC2001: 5 32" x 4" x 6" No. HC2011: 3 16" x 4" x 6" No. HC2041: 1 4" x 4" x 6" No. HC2042: