Premium Diamond Segments: Provide sharp, accurate drilling and extended lifespan.
Wide Diameter Range: Suitable for various hole sizes in stone and granite.
Smooth and Chip-Free Drilling: Ensures professional-grade results on hard surfaces.
Wet and Dry Use: Versatile design for efficient drilling in all conditions.
Durable Construction: Built for demanding applications in construction and stone fabrication.
Tool Compatibility: Fits most standard drills, angle grinders, and core drilling machines.






CNC Finger Bit D20x30 For Edge Grinding Diamond Profiling Wheel 1/2 Gas Thread Profile Wheel For Granite Marble – 1 Piece
$170.00 Original price was: $170.00.$136.00Current price is: $136.00.
The Diamond Core Drill Bits are high-performance tools specifically designed for precise drilling in stone, granite, marble, and other hard surfaces. Featuring industrial-grade diamond segments, these bits deliver clean, chip-free holes while maintaining exceptional durability. Perfect for professional fabricators, masons, and DIY enthusiasts, these drill bits are an essential addition to any toolkit for stone and granite projects.
Available in various diameters, the Diamond Core Drill Bits are versatile and suitable for applications such as countertop installations, sink holes, and decorative stonework. Designed for use with wet or dry drilling, these bits ensure smooth performance while minimizing wear and overheating. Compatible with standard drills and angle grinders, they offer reliability and efficiency for both heavy-duty and detailed tasks.

Diamond Core Drill Bits for Stone & Granite

Key Features

A diamond core drill bit

Close-up of the diamond segments

The drill bit in use on a marble

Powerful Device
| Brand Name | Stone Tech Inc |
|---|---|
| Model Number | CNCW |
| DIY Supplies | Tiling |
| Type | Abrasive Block |
| Size | D20x30 |
| Shaft Size | 1/2″ Gas |
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