1. Made from diamond powder, high-quality, precise and durable to use
2. The speed of drilling machine need to be reached 20000 RPM when you use our drill bits to drill holes
3. The higher speed of drilling machine, the better effect of drilling bits
4. Idea for drill holes on the jewelry, ceramic, jade, agate, glass, amber and semiconductor materials etc
Specifications:
Material: Diamond Powder
Color: Silver
Length: Approx. 36mm
Diameter of Shank: 0.6mm
Diameter of Head: 1mm
Weight: Approx. 4g
Quantity: 20PCS
Package Included:
20 x Lapidary Drill Bits