Din 338 hss-co drill bit ø4.00 mm. 2 units in a pouch made of hss co 5% according to din 338. self-centering split point sharpening with special chipbreaker for stainless steel on the cutting edge. 130° point angle and type n 30° helix. anti-slip three-flat shank to prevent chuck slippage. specific for work on stainless steels, steel and metals