1/4" Conical Tip Carbide Burr

Create Holes & Slots With Ease

Model # LR-CTB-046

Price: $21.98

Cut holes, slots & irregular shapes in wood, wallboard, wall tile, etc. Countersink screw holes. Start and enlarge holes.

See full description below for more details...

Create Holes & Slots With Ease

1/4” (6mm) Conical Tip Carbide Burr

LR-CTB - Long Life Carbide Drill Bit for 1/4” (6mm) Chucks and Collets


Cut holes, slots & irregular shapes in wood, wallboard, wall tile, etc. Start and enlarge holes.

Works great with 1/4" drills at speeds up to 20,000 RPM!  Perfect for light manufacturing, repair & D.I.Y. Projects!

Use with Die Grinders and other 1/4”chuck drills.

“These 1/4” carbide burrs work so well with all the various composite materials we deal with. They leave a great finish and when boring holes and cavities, produce little to no chipping of surface finishes.”

- M. Masterson - Composite materials expert


They show little to no wear in regular use on composites. Great for use on fiberglass or carbon fibre in light aircraft or race car bodies.

High Performance:

Good for use in 1/4” (6mm) drills and die grinders. They are strong and aggressive, won’t fracture, shatter or bend and the grit won’t tear loose. They just get the job done - over and over again.


  • rapid material removal
  • great hole and irregular cavity procurement in composites 


  • Fashioning and fitting of composite materials in light aircraft and race car manufacturing
  • Cutting apertures in composite and fibreglass instrument panels for new radios etc.
  • Detail burr for large scale woodcarving
  • Professional mould making detailing burr
  • DIY around the house and more…



  • hard woods
  • soft woods
  • laminates
  • masonite
  • fibreglass
  • carbon-fiber
  • composites
  • laminates
  • plastics (ABS, PVC etc.)
  • MDF
  • rubber
  • leather
  • and more…
  • (Not recommended for use on metal) 

To assist you with your selection of the appropriate grit grade for your DuraGRIT® carbide sanding tool, note some typical uses based on grit grades by reading the following knowledge base article:

What are Typical Uses (and suggested grit grades) for DuraGRIT Carbide Tools?


  • Run at speeds up to 20,000 RPM!
  • Diameter: 1/4" (6mm)
  • Mandrel: 1/4" 
  • Length: 3" (76mm)
  • Grit Grade: 46 grit

You'll have a hard time running out of ways to use them!

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