RED HELIX™ Cobalt Drill Bit Set – 23PC

The Milwaukee 48-89-2338 is a 23-piece RED HELIX™ cobalt drill bit set designed for heavy-duty drilling in tough metals, especially stainless steel, hardened steel, and cast iron.

Key Features

• Cobalt Alloy Construction – Built for extreme heat resistance and long life in hard metals (up to ~10–15× longer than black oxide bits)
• RED HELIX™ Variable Flute Design – Aggressive 35° helix transitions to 15° for fast chip removal and reduced heat buildup
• QUADEDGE™ 135° Split Point Tip – Starts on contact and prevents walking for accurate hole placement
• Enhanced Tapered Web – Strengthens the bit core to reduce breakage under load
• 3-Flat Secure Grip Shank – Helps prevent slipping in the drill chuck

What’s Included

A full 23-piece range from 1/16" to 1/2", including common intermediate sizes for metalworking and fabrication tasks.

Best Uses

• Stainless steel drilling (primary use)
• Hardened steel, alloy steel, and cast iron
• Structural metal and fabrication work
• General heavy-duty shop use