Internal Tool Single A Nc-343-375 N/C Counterbore, Handy Pick for Fabricators and Steel Crews, Sharp Cutter Built for Long Tool Life, Pro Grade Annular Cutter for Fast, Clean Big Holes

Internal Tool Single A Nc-343-375 N/C Counterbore
✔️ Single counterbore, 343-375, Mag Drill Ready, Long Tool Life

The Internal Tool A Nc-343-375 N/C Counterbore is an annular cutter for fast, clean, large holes in steel with a magnetic drill. Fabricators, steel erectors, welders and maintenance crews use it on mag drills for big holes in plate, beams and tube. This listing is for one single item.

✅ Brand: Internal Tool
✅ Mfr part number: 85-3431
✅ Product type: Counterbore
✅ Pack size: Single, 1 piece
✅ Thread size: 343-375

💡 HSS vs carbide tipped annular cutters, which should I choose?

It depends on the material and how many holes you cut.

• HSS cutters are a solid all around pick for mild steel.
• Carbide tipped cutters last longer and cut stainless and hard steel.
• Cobalt cutters handle heat in tougher alloys.

Grab the Internal Tool A Nc-343-375 N/C Counterbore and get the job done right.