The MILWAUKEE® RED HELIX™ Cobalt 5/16" Drill Bit are engineered for extreme durability and longer life in hard metal applications. The Milwaukee Cobalt drill bits are designed with a VARIABLE HELIX ™ that includes an aggressive 35° Helix Angle which ends at 15°. The drill bits have QUADEDGE TIP™ to decrease heat buildup and drill faster. The 135° split point tip delivers a precision start and prevents walking for fast, accurate holes in Hard Metal, PVC and wood.The tapered drill bits feature a new ENHANCED TAPERED WEB™ that strengthens the bit's core to increase flute durability. The cobalt twist drill bits are ideal for tough applications, providing up to 15X life vs. Black Oxide Drill Bits™.

Milwaukee® RED HELIX™ Jobber Length Drill Bit, Imperial, 5/16 in Drill - Fraction, 0.3125 in Drill - Decimal Inch, 4.63 in Overall Length, 3-3/16 in Cutting Depth, Parabolic Flute, 3-3/16 in Flute Length, 3/8 in Shank, 3-Flat Shank, 135 deg Point, Split Point, Right Hand Cutting Direction, Steel Cutting Edge, Steel, Cobalt, Applicable Materials: Cast Iron, High Alloy Steel Metal, Plastic, PVC, Stainless Steel and Wood

• QUADEDGE TIP™ designed to decrease heat build up and drill faster
• ENHANCED TAPERED WEB™ strengthens the bits core
• VARIABLE HELIX™ design for rapid material extraction
• Longer life - thicker web provides greater strength and longer life
• Fast, accurate drilling - 135 deg split point tip starts on contact to prevent walking while the parabolic flute clears chips fast
• Cobalt alloy for up to 15X Life vs Black Oxide Drill Bits
• 3-Flat Secure-Grip helps keep the bit fixed within thechuck