EZARC Countersink drill bit set with 5-flute hex shank for clean countersinks in hard metals.
EZARC countersink bits deliver precise deburring on stainless steel surfaces.
EZARC 1/2 inch countersink bit ensures smooth hole finishes in hard metals.
EZARC 5/8 inch countersink bit reduces burrs in tough alloys.
EZARC storage box keeps all bits organized for quick jobsite access.
EZARC Altin coating close-up highlights durability and heat resistance.
EZARC in-use on stainless steel shows stable, burr-free countersinking.

EZARC

EZARC Countersink Drill Bit Set AlTiN Coated 82 Degree 5-Flute 1/4 Hex Shank 5-Piece with Storage Box

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$49.54

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Why customers choose TaskHolt Tools

Overview

Meet the EZARC Countersink Drill Bit Set, a compact 5-piece collection built for hard metals and demanding setups. The set pairs durable geometry with a high‑tech coating to help you achieve clean countersinks and precise edge finishing, even when working with stainless steel and alloy steels.

Why it stands out

  • Long-Lasting AlTiN Coating: Premium AlTiN delivers exceptional hardness and heat resistance with low friction, helping maintain performance across multiple holes and sessions.
  • Optimized for Hard Metals: Engineered for stainless steel, alloy steel, and other hard materials; results may vary on softer metals.
  • 5-Flute Design for Smooth Cuts: Five flutes reduce vibration and spread cutting forces evenly, aiming for stable, burr-minimized countersinking.

Versatility on the job

  • Countersinking & Deburring: Ideal for chamfering hole edges and creating flat countersunk seats on pre-drilled holes, helping finished fasteners sit flush.
  • Universal Quick-Change Hex Shank: The 1/4" hex shank fits drills and electric screwdrivers securely for fast, precise changes. A durable storage box keeps everything organized on site.

The kit includes five widely used sizes—1/4", 3/8", 1/2", 5/8", and 3/4"—paired with an 82° countersink angle to help create consistent, flush seating for a range of fasteners. The combination of size variety and the AlTiN coating supports steady performance across common metalworking tasks.

Practical usage tips

  • Maintain steady feed pressure and moderate speeds to maximize edge quality and minimize burrs.
  • Lubrication can help reduce heat buildup during extended drilling sessions in very hard metals.

In real-world use, you may notice smoother execution, cleaner edge finishes, and quicker setup changes thanks to the hex shank and organized storage case. As with any tooling, results depend on your material, drill setup, and technique, but this set is designed to support precise, repeatable countersinking without frequent bit changes.

FAQ

Q: What materials is the EZARC Countersink Drill Bit Set best suited for?

A: Designed for hard metals like stainless steel and alloy steel; performance may vary with softer metals.

Q: Is the shank compatible with standard drills?

A: Yes, the 1/4 inch hex shank fits most drills and screwdrivers; includes a durable storage box.

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