Fiorenzato Dark-T® burrs are an evolution of the M340, designed to further improve grinding performance.
 
They last five times longer than our standard burrs, thanks to a special black coating of titanium, aluminium, carbon and nitrogen.
 
64 mm x 37 mm, x  8.5 mm with 3 holes, right-hand rotation. Made with M340 steel, with the Dark-T coating these should last for ~ 3.000 kg (standard steel burrs usually last for only 600 kg).