Thunderbolt 48-89-2721 Jobber Length Drill, 15/64 in Dia x 3-7/8 in OAL, Cobalt

About the Thunderbolt 48-89-2721 Jobber Length Drill, 15/64 in Dia x 3-7/8 in OAL, Cobalt

The Milwaukee 48-89-2721 model 15/64" 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.