Dual Function HSS Cobalt Two Stage Step Drill Bit For Metal With 90 And 180 Degree Second Stage Profiles, Counterbore Spiral Design For Reaming And Chamfering, Precision M6 180 Degree Drill Bit For Fast Efficient Metalworking

Dual-Function HSS Cobalt Two-Stage Metal Drill Bit
✔️ 180° or 90° second stage for reaming and chamfering

This spiral step drill bit combines reaming and chamfering in one handy tool, speeding up metalworking tasks. It's ideal for drilling into cast metal, copper, aluminum, tool steel, die steel, and similar alloys, and is commonly used in automotive repair, fabrication, and DIY projects.

✅ Dual-function design enables reaming and chamfering in a single operation
✅ Premium HSS cobalt steel construction handles materials up to HRC 30
✅ Available sizes for M3, M5, M6, M8, M10 with efficient chip evacuation
✅ Black oxide finish adds hardness and reduces friction during drilling
✅ 180° or 90° second stage options for fast, clean holes

💡 What is a spiral step drill bit used for in metalworking and how does dual reaming and chamfering help?

This handy tool speeds up work by combining two operations in one bit. - doubles as reamer and chamferer to make two-stage holes in one pass - reduces tool changes and speeds up metalworking workflows - chip evacuation is improved by the spiral design, lowering heat buildup - fits M3-M10 sizes for common fasteners and projects