Thunderbolt 48-89-2722 Jobber Length Drill, 1/4 in Dia x 4 in OAL, Cobalt, Black Oxide

About the Thunderbolt 48-89-2722 Jobber Length Drill, 1/4 in Dia x 4 in OAL, Cobalt, Black Oxide

The Milwaukee 48-89-2722 model 1/4" Thunderbolt Black Oxide Drill Bit is a part of the Black Oxide Drill Bits Series. This black oxide bit is made for extreme durability and long-life. It gives you a thicker core than a standard drill bit, and its specially made parabolic flute form clears chips and debris fast.