Description: Lapidary Drill bits can drill stone, sea shell and glass.
These economy grade are Plated Diamond Drill bits from a variety of manufactures.
The thick solid posts gives rigidity while drilling but reduces depth.
Use water when Drilling. Drill bits are very different than burrs. Drill bits put a hole in things. Burrs carve. Use them accordingly.
Drill Bit Lifespan (Average): 5 to 20 holes each. In soft stone, expect 20 holes per bit. In agate, expect 5 holes per bit.
To drill longer distances, through thicker material than standard slabs (4mm)- use Deep Drills.
To drill holes larger than 3mm - see Core Drills. 

Made In: China

Head Size: Refer to Selection
Shaft Diameter: 2.3mm
Overall Length: 42mm

Quantity: 1 Piece