Fein HSS Dura 25 core drill bits with QuickIN holders, designed for demanding drilling 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, with short-term dry drilling also possible. Available in selected diameters from 12 mm to 50 mm, all with a 25 mm cutting depth.