3/16" COBALT RED HELIX™ Drill Bit

The Milwaukee 48-89-2309 is a 3/16" RED HELIX™ cobalt drill bit designed for high-performance drilling in hard metals, especially stainless steel and other tough materials.

Key Features

• Cobalt Alloy Construction – Built for extreme heat resistance and up to 10–15× longer life vs. black oxide bits
• RED HELIX™ Variable Flute Design – Starts aggressive (35°) and transitions to 15° for faster chip removal and reduced heat buildup
• QUAD EDGE™ Tip (135° split point) – Helps start on contact and prevents walking for accurate drilling
• Enhanced Tapered Web – Strengthens the core to reduce breakage under load
• 3-Flat Shank – Improves grip in the drill chuck and reduces slippage

What It’s Designed For

• Stainless steel and hardened metals (primary use)
• Structural steel and metal fabrication
• PVC and plastic
• Wood (secondary use)