Irwin 323006 Hammer Drill Bit 5/8 x 21

- Diameter: 5/8 ; Usable Length: 16 ; Overall length: 21 ; 4-Cutter Head; Allow quicker removal of dust while drilling.; Centering point prevents walking.; Reduces breakout in through-hole applications .; Provides more cutting surface than competitor s tip .; The new patented carbide tip on IRWIN SDS-plus Hammer Drill Bits is self-centering for more control as drilling begins. It also offers more aggressive cutting angles for faster drilling. A larger tungsten carbide tip improves strength and durability;