Milwaukee Thunderbolt Black Oxide 21 Piece Drill Bit Set (Model 48-89-2801)

Milwaukee’s 21-Piece Thunderbolt™ Black Oxide Drill Bit Set delivers professional-grade performance and long life for a wide range of drilling tasks. Crafted from high-carbon steel with a durable black oxide finish, each jobber-length bit features the reinforced Thunderbolt web core to resist side-load breakage. The precision-start 135° split-point tip bites on contact to eliminate walking and deliver accurate, clean holes. Parabolic flutes clear chips quickly to reduce heat buildup, while the 3-flat secure-grip shank locks firmly in 3/8″ chucks for straighter drilling and less slip. Ideal for wood, plastic and metal applications, this versatile set covers sizes from 1/16″ to 1/2″ in 1/64″ increments.

Key Features

• High-carbon steel construction with black oxide coating for corrosion resistance
• Thunderbolt web core for enhanced strength and extended bit life
• Parabolic flute design clears debris fast and keeps the bit cool
• 135° split-point tip ensures precise starts and prevents bit walking
• 3-flat secure-grip shank reduces slipping in the chuck
• Complete range of sizes (1/16″–1/2″ in 1/64″ steps) for maximum versatility
• Engineered for use in standard 3/8″ chucks
• Suitable for drilling wood, plastic and metal