Internal Tool Single A Nc-359-375 N/C Counterbore, Tough Core Cutter for Mag Drills and Steel Work, Handy Pick for Fabricators and Steel Crews, Sharp Cutter Built for Long Tool Life

Internal Tool Single A Nc-359-375 N/C Counterbore
✔️ Single counterbore, 359-375, Fast Clean Holes, Mag Drill Ready

This Internal Tool A Nc-359-375 N/C Counterbore is an annular cutter for fast, clean, large holes in steel with a magnetic drill. It's a go-to in structural steel, shipyards and fab shops. This is a single piece listing.

✅ Brand: Internal Tool
✅ Mfr part number: 85-3591
✅ Product type: Counterbore
✅ Pack size: Single, 1 piece
✅ Thread size: 359-375

💡 What is an annular cutter and why use it instead of a twist drill?

Annular cutters only cut the rim of the hole, so they work faster with less power.

• They leave a solid slug instead of turning it all to chips.
• Cuts are cleaner and more accurate than twist drills in steel.
• They run great on magnetic drills for big holes.

Pick up the Internal Tool A Nc-359-375 N/C Counterbore and keep your jobs moving.