M4 Straight Shank Counterbore End Mill 4 Flute HSS Cutter 2 Pack With 6mm Shank And 8mm Cutting Diameter 4.2mm Guidepost 48mm Overall Length Ideal For Smooth Metal Milling DRINYOUNG

M4 Straight Shank Counterbore End Mills, 2-Pack HSS Cutter
✔️ 6mm shank, 8mm dia, 4-flute, 48mm length, 2pc pack

The M4 straight shank counterbore end mills are high-speed steel (HSS) cutters designed for metal milling. The 8mm cutting diameter and 4-flute geometry deliver cleaner side walls and smoother finishes in steel, aluminum, and other metals. Perfect for pockets, countersinks, and spotfaces in workshops, maker spaces, and DIY setups.

✅ 4-flute design for higher feed rates and smoother finishes on side walls
✅ 6mm shank diameter fits standard collets and chucks
✅ 8mm cutting diameter provides precise countersinking and seating
✅ 48mm overall length offers compact reach for tight spots
✅ 2-piece pack for value and ready replacement

💡 What is a counterbore end mill used for in metalworking? A handy explainer: - Creates flat-bottom pockets for screw heads and accurate seating
- The 4-flute design helps maintain stable cuts and better finishes
- High-speed steel provides a tough, cost-effective option for DIY shops
- Use with appropriate feeds and speeds to minimize chatter and wear