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Transparent case holding 14 cobalt drill bits size 24 with 135 degree tips

ARTU USA INC

ARTU USA INC 14 pc Cobalt 135° Drill Bit Set 1304 #24

SKU CH-3FDA-EGNZ3

Cobalt 135° drill bit set contains 14 pieces in size #24 for hard-metal drilling

  • Product colorTransparent
  • 14-piece cobalt set resists heat and wear
  • 135-degree split-point tips start holes without walking
  • Wire-gauge #24 bits drill precise small-diameter holes
  • Cobalt steel construction extends bit life in hard metals
  • 1304 kit organises 14 bits for quick size selection

14-Piece Cobalt Drill Bit Set

This 14-piece cobalt drill bit set from ARTU USA INC is built for drilling into hard metals such as stainless steel and high-strength alloys. The 135-degree split-point tips reduce walking and deliver faster starts without a centre punch. It suits professional mechanics, metal fabricators and serious DIYers who need repeatable precision in tough materials.

Upgrade from standard high-speed steel bits

Cobalt alloy construction withstands significantly higher heat than ordinary high-speed steel, so the cutting edges stay sharp longer during extended drilling sessions. The jump is worth it when you regularly drill hardened steel, titanium or abrasive composites that burn up conventional bits in a single job.

Handles #24 wire-gauge holes with ample tool life

The set centres on a #24 wire-gauge drill bit, covering pilot and clearance holes for small fasteners and electrical work in metal. Fourteen bits give enough duplicates to keep production moving when one dulls or breaks. It runs out when the application demands larger diameters or specialised coatings not included in this assortment.

How it compares

Measured against everything we stock in Ratchets, Sockets & Drive Tools, at today’s prices. Recalculated every night.

Price $64.99
Pricier than about 76% of the 418 comparable items (median $20.99).

Specifications

Product
Brand nameARTU
Product colorTransparent

Questions about this item

What drill size does the #24 bit in this 14-piece set correspond to?

The set includes 14 cobalt bits sized at #24 wire gauge, each ground to a 135-degree split point for self-centering starts.

How should I start a hole with these 135-degree cobalt bits to avoid walking?

Apply firm, steady pressure at low RPM; the 135-degree split point is designed to bite instantly without a centre punch, but excess speed causes heat and premature wear.

When will the #24 bits in this cobalt set need replacement?

Replace a bit when the cutting lips show rounding or the split point no longer self-centres; cobalt steel holds an edge longer than high-speed steel but cannot be resharpened to original geometry once the 135-degree angle is lost.

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