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Cle-Line cobalt drill bit, 9/32 inch, 135-degree point, straw finish

Cle-Line

Cle-Line C30518 9/32 in 135 Degree Cobalt Left-Hand Mechanics Length Drill

SKU CH-H2WX-X30TZ

A 9/32 inch cobalt drill bit with a 135 degree left-hand point for mechanics length applications

  • Left-hand fluting removes broken fasteners efficiently
  • 135-degree split point starts on contact without walking
  • Cobalt steel withstands high heat in tough alloys
  • Mechanics length gives extra reach in tight spots
  • Straw finish reduces friction for smoother cutting

Cle-Line C30518 Left-Hand Cobalt Drill

This mechanics-length drill bit is made from cobalt steel with a 135-degree split point. It uses a left-hand helix for reverse cutting applications. The fractional size is 9/32 inch with a decimal equivalent of .2813. A straw finish identifies the surface treatment.

Suited for reverse drilling and extractor use

Mechanics and machinists who need to remove broken fasteners will find the left-hand rotation effective. The cobalt construction handles hard materials such as stainless steel. Buyers who require standard right-hand cutting for general holemaking should look at a different drill bit style.

Straw finish indicates heat treatment

The gold-coloured surface shows the bit has been heat-treated for hardness. No additional coatings or accessories are included in the package. The finish helps the user identify the tool as cobalt rather than high-speed steel at a glance.

How it compares

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

Price $4.99
Cheaper than about 95% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLE-LINE

Questions about this item

What chuck size do I need to hold the 9/32 in shank?

Use a drill chuck that opens to at least 9/32 in (0.2813 in) so the cobalt bit seats securely without slipping.

Will the left-hand flutes on this 135-degree bit engage properly in a standard right-hand drill motor?

The motor must run in reverse; left-hand flutes only cut when the spindle turns counter-clockwise, so set your drill to reverse before starting.

How can I verify the 135-degree split point is centring correctly on first contact?

The bit should bite instantly without a centre punch — if it walks or requires heavy pressure, the split point may be dull or misaligned.

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