Century Drill and Tool 24121 Black Oxide Pro Grade Drill Bit 21/64 Inch

The Century Drill and Tool 24121 is a professional-grade black oxide drill bit designed for drilling soft metal, mild steel, wood, plastic, and PVC. Manufactured from industrial high-speed steel with a black oxide surface treatment, this 21/64-inch drill bit delivers exceptional performance and extended tool life.

Key Features:

• 21/64-inch (0.328-inch) diameter for precise drilling applications
• 135-degree quick-cut point design is self-centering for faster penetration with less pressure
• Black oxide finish provides 6 times the life rating compared to standard 118-degree point drill bits
• Industrial high-speed steel (M2 grade) construction for durability
• Will not walk or wander at the starting surface—no center punch needed
• Manufactured to Aerospace NAS 907-B specifications
• Ground flats on shank prevent slipping in chuck

The black oxide coating enhances heat resistance and reduces friction during operation, extending the life of the bit. Ideal for general-purpose drilling in various materials including common steel, flat bar, angle iron, tubing, wood, and plastic. For best results when drilling metal, use with cutting oil.