Single electroplated burr, 3 mm shank, 2 mm diameter ball, for gentle use.
 

 
Excellent for all natural stone work.
 
They also cut ceramic, glass, and bone very well.
 
Perfect for engraving, satin finishing, finishing, and micro-restorations.
 
Dry use, but performance and durability are significantly improved when lubricated.
 
Shank dimensions: 3 mm. 18" inch.
 

 
150 grit. Suitable for micromotors such as Proxxon, Dremel, and flexible shaft.
 

 
Electroplated burr, 3 mm shank, 2 mm diameter ball. Diamond burrs for marble.