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Metal index case holding nineteen cobalt jobber drill bits with straw bronze finish

Chicago-Latrobe

Chicago-Latrobe 47924 19PC 135° Cobalt Jobber Drill Set

SKU CH-8PR0-HKPWC

19-piece cobalt drill bit set with 135-degree points for heavy-duty drilling tasks

  • Product typeDrill Bits
  • 19-piece set covers a wide range of hole sizes
  • 135-degree split point reduces walking on hard materials
  • Cobalt steel withstands high heat during heavy-duty drilling
  • Straw/bronze finish resists corrosion for longer bit life
  • Jobber length suits general-purpose workshop applications

19-Piece Cobalt Jobber Drill Set

This 19-piece drill bit set from Chicago-Latrobe uses M35 cobalt steel for hardness and heat resistance. The 135-degree split point reduces walking and starts holes cleanly in metal. It suits maintenance technicians, metal fabricators and serious DIY users who need durable bits for repeated drilling in tough alloys.

Sustained drilling in hard materials

Cobalt alloy retains hardness at the elevated temperatures produced during extended drilling sessions. The straw-bronze finish helps identify the bits and provides a degree of corrosion resistance. Heavy-duty web construction resists breakage when feed pressure is maintained through thick workpieces.

Jobber length and 135-degree point geometry

Jobber-length flutes limit the maximum hole depth to the flute length of each bit. The 135-degree point angle is optimised for stainless steel and high-strength alloys; it is less aggressive in soft aluminium or plastics where a sharper angle would cut faster. Users needing extra reach or specialised coatings must select a different set.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $90.99
Pricier than about 81% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits

Questions about this item

How much heat does the 135° cobalt drill set generate during continuous drilling?

Cobalt steel dissipates heat better than standard high-speed steel, so the 135° split point runs cooler during extended drilling sessions.

What drill chuck size is needed to hold the 19-piece cobalt jobber set?

The jobber-length shanks fit any standard 1/2-inch or 13 mm three-jaw chuck found on most bench and cordless drills.

Will the 135° split-point bits work in my older 3/8-inch variable-speed drill?

Yes, the 135° self-centering point reduces walking and requires less thrust, so it performs well even on lower-torque vintage drills.

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