Spiral Flute - BSW
HSS-EV3. Oxidised finish. 1066QS for blind holes..

Type 1066
Manufactured from 3% vanadium super grade high speed steel. Increased vanadium produces toughness without adding brittleness. Greater resistance to work generated heat. Prolonged cutting edge life. Manufactured to ISO 529 : 1975.
BSP and BSPF also available.