Diamond 539328, ISO 257, medium, 5 pcs. / Set

ISO Fig. No. 257
Diameter: 0.18 mm
Head length: 0.4 mm

FG Piranhas own 3-layer diamond
Speed: 30`-300,000 rpm
 
This article is available in several versions.
There are following options available:

• superfine 
• fine
• medium
• rough
• extra coarse

The selection here is "coarse", also visible on the green marking of the drill.