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Twenty cobalt drill bits in a case, each 1/16 inch diameter with gold finish

Cortool US10000000 20-pack 1/16" M35 cobalt drill bits 1.59 mm 135° split point

SKU CH-H7KW-3ZRY9 MPN US10000000

A 20-piece set of 1/16 inch M35 cobalt drill bits with 135-degree split points for precise drilling in hard metals and other materials

  • Fit and compatibilityHard Metal, Stainless Steel, Iron, Copper, Aluminium, Brass,
  • Commercial or home use1/16 in
  • Product typeDrill Bits
  • Main materialSteel
  • Sold asCORTOOL 1/16 in Cobalt Drill Bits (20Pcs), 20, 1/16 in Cobal
  • Number of items20, CORTOOL 1/16 in Cobalt Drill Bits (20Pcs)
  • 20-piece set keeps replacements ready for high-volume jobs
  • M35 cobalt steel with 5% cobalt resists wear in hard metals
  • 135° split point starts on contact without a centre punch
  • 22 mm flute length clears chips for cooler drilling
  • 59 mm diameter suits 1/16 inch precision holes

Application scope

This 20-piece set supplies 1/16 inch M35 cobalt drill bits for drilling hard metal, stainless steel, iron, copper, aluminium, brass, plastic and wood. The 135° split point with straight shank prevents walking and removes the need for a centre punch. It fits the majority of power drills on the market. Buyers who need larger diameters or longer flute lengths will need a different set.

Sustained drilling behaviour

Fully ground spiral grooves clear particles quickly, reducing friction and heat during extended drilling sessions. The M35 high-speed steel with 5% cobalt maintains hardness up to 1100 degreeF, preserving cutting edges through repeated holes in tough alloys. Consistent speed, pressure and heat control remain essential for best results.

Thermals and power draw

The split-point geometry and dual-flute design lower cutting temperatures by evacuating chips efficiently. Cooler operation reduces bit wear and workpiece distortion in normal use. No electrical power rating applies to the bits themselves; they draw energy from the host drill.

How it compares

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

Price $12.99
Cheaper than about 82% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCortool
Model nameUS10000000
Part numberUS10000000
Product typeDrill Bits
Size & build
Main materialSteel
Compatibility
Fit and compatibilityHard Metal, Stainless Steel, Iron, Copper, Aluminium, Brass, Plastic & Wood
In the box
Number of items20, CORTOOL 1/16 in Cobalt Drill Bits (20Pcs)
More details
Commercial or home use1/16 in

Questions about this item

Does the M35 cobalt steel handle heat buildup during long drilling sessions?

The M35 cobalt high-speed steel contains 5% cobalt and withstands up to 1100 degreeF, giving high wear resistance and durability for extended use.

What shank style do these 1/16" bits have so I know if they fit my drill chuck?

Each bit has a straight shank that fits the majority of power drills on the market.

Will the 135° split point start cleanly in harder alloys I already work with?

The 135° split point with straight shank prevents walking and makes drilling precise and faster without a center punch, even in stainless steel and cast iron.

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