Fein HSS Dura 50 core drill bits with QuickIN holders, designed for demanding drilling applications in steel and stainless steel. Manufactured from HSS steel for high shock and impact resistance, with a titanium nitride TiN coating to reduce friction, improve wear resistance and allow higher cutting speeds. Suitable for steel up to 750 N/mm², stainless steel and aluminium, and also suitable for short-term dry drilling. Available in diameters from 12 mm to 50 mm, all with a 50 mm cutting depth.