Calidad 6mm (5/16") Diamond Core Drill Bit "Needle D's 3.0" - Calidad Tools
Calidad 6mm (5/16") Diamond Core Drill Bit "Needle D's 3.0" - Calidad Tools
Calidad 6mm (5/16") Diamond Core Drill Bit "Needle D's 3.0" - Calidad Tools
Calidad 3/16" Vacuum Brazed Dry Diamond Core Drill Bit "Needle D's 2.0" - Calidad Tools

Calidad 8mm (5/16") Diamond Core Drill Bit "Needle D's 3.0"

10 reviews
Normaler Preis
Normaler Preis

"Needle D's 3.0" for Angle Grinders

6mm Diamond Hole Bits for high-speed hole-making and a long lifespan. The new standard for hole bits performance. 

Unleash the power of our Diamond Hole Bits, meticulously engineered for rapid hole creation and extraordinary lifespan. These 8mm (5/16") hexagonal bits, featuring a 1/4" shank, are constructed from sturdy, solid steel. They are the epitome of seamless hole-making prowess. Witness these bits' longevity, precision in cutting smaller holes, and absolute integrity.

Experience the Vacuum Brazed Diamond Technology in action: our bits are fortified with high-strength diamonds that make tile drilling a breeze. This technology shines particularly when drilling pristine holes through robust materials, such as porcelain floors, granite ceramics, glass mirrors, marble stone masonry, and bricks.

Great for various applications: from custom shower pans, and shower bases to shower walls, towel bars, and toilet paper hangers. 


  • Diamond Coating: This enhances drilling speed significantly, giving you an edge in efficiency.
  • Depth Mark: The thoughtful inclusion of a depth mark ensures meticulous precision for your unique projects
  • Convenient Storage: Your purchase comes with a portable plastic storage case, enabling easy access and safekeeping
  • Start Tip Technology: Our exact start tip minimizes bit walking, ensuring a smooth start to every drilling task.
  • Pressure Relief: Perfectly suited to alleviate pressure on specific cuts for an impeccable finish.
  • Dry Drilling Design: Each Diamond Drill Bit is integrated with a wax lubricant that liquifies during dry drilling, cooling the cutting surface. You may also introduce water as an additional cooling agent to further extend the life of the bit.
  • Lifespan: 35+ holes 
  • Applications
  • Great for all types of hard materials such as quarry tile, porcelain, slate, ceramic, marble, travertine, and granite
  • Features
  • 3/16" (5mm) Vacuum brazed, Diamond technology, 14" Shank, Steel Shaft
  • Equipment
  • Fits a variety of quick-change chucks, drills or drivers

Customer Reviews

5.0 Based on 10 Reviews
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100reviewers would recommend this product
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Colin H.
United States United States
I recommend this product

Grab bar machine

Like buttah finally something to rely upon

Paul G.
United States United States
I recommend this product


I was impressed I will buy it again

michael m.
United States United States
I recommend this product

You’d be ****** not to buy this bit

This bit lasts foreverrrrrr!!!! Don’t be fooled by the others online. This is legit af


Made light work

Great tool, very fair priced


Great little bit.



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