Drill Service (Horley) Ltd Contact sales on sales@drill-service.co.uk or call +44 (0)1293774911 DCOSTEPTIN - HSCo Tin Coated Multi Step DrillsHSCo Cobalt TiN Coated Multi Diameter Step Drills for machining sheet steel and thin materials. HSS + TiN = hardness 63 HRC, to machine steels up to 800 N/mm², copper, brass, bronze, aluminium up to 6% Si. The TiN coating ? hardness 2300 HV increases the tool life by increasing wear resistance.
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