Cle-Line C21030 Hammer Drill Bits; Drill Bit Size (Decimal Inch): 1.0000 ; Usable Length (Inch): 16; 16.0in ; Overall Length (Inch): 18; 18in ; Shank Type: SDS-Plus ; Number of Flutes: 2 ; Drill Bit Material: Carbide Tipped; High Speed Steel; Carbide