The Milwaukee 48-89-2724 9/32 in. Thunderbolt Black Oxide Drill Bit features a thick core for protection against side-load breakage. This drill bit is made from black oxide and has a secure-grip shank that won't slip in the chuck. The parabolic flute form helps clear away chips and debris to keep the bit cool, and this drill bit is excellent for drilling on curved surfaces.

• Thunderbolt web, provides longer life and faster driller times
• Parabolic flute, clears chips faster
• Black oxide construction for durability
• 135-degree split point, precision start no walking