carbide milling burr: F060FC for chrome-cobalt alloys, precious metall alloys, chrome-nickel alloys, model cast production description:diameter: 2.30mm , length: 44.5mm, ISO NO. :500.104 order no. :F060FCfine cross cut carbide milling burr, tungsten milling burr HPAll burs are on a 2.34mm shaft, hp type shank, with blue rings tungsten carbide milling burr