6855 Rubi DRYGRES Drill Bits

SKU: 6855
Manufacturer: Rubi Tools
$20.35 to $72.45


$20.35 to $72.45


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Rubi DRYGRES Drill Bits

Dry core bit to drill porcelain, granite and marble 5/8" female arbor, fits on high-speed and variable speed angle grinders. Very fast cutting on granite and engineered stone


  • For drilling of ceramic tile, porcelain and stone
  • 5/8"-11 thread female arbor fits angle grinders
  • Maximum Speed 14,000 RPM
  • Available sizes: 1/4", 3/8", 1-1/8", 1-3/8", 2"
  • Vacuum brazed diamond set in vacuum for greater durability
  • Vacuum brazed bits can be used wet or dry
  • Drill bit body made of highly resistant steel
  • Air cooling slots for increased cooling and core removal
  • Usable with grinder (direct connection) or electric drill (adapter) part no. 05976)

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Ratings & Reviews

3 reviews

  • 4 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

Great drill bits to use in the grinder


I used it in the grinder to drill hard porcelain tile and the performance was really good. Very easy to use and cuts look great!

Excellent product


Very impressive drill bits. Fast and last

Short lifespan


Decent bits, they tend to wear out quickly in porcelain regardless of how fast or slow they are used. Lifespan seems to be 20 holes or less for the 1/4" size.