Din338 hss-co stepcut drill bit, ø7.00 mm, in a pouch with step cut tip special for drilling in tubes, curved and unstable surfaces. the tip does not slip. made of hss co 5% according to din 338. type n 30° helix. for diameters larger than 5 mm anti-slip three-flat shank to prevent chuck slippage due to stress. specific for work on tubes, curved and unstable surfaces in stainless steels, steels and general metals up to 120 kg/mm²