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		 Drill Service (Horley) Ltd Contact sales on sales@drill-service.co.uk or call +44 (0)1293774911 DCOSTEP - HSCO 90 Degree Step Drills 
		HSCO 90 degree Step Drills are designed for combining both boring and counterboring before a threading operation. Their design ensures rigidity and longer tool life. 
 From M3 - M16 
 For threading the hole please use our Single Form Carbide Thread Mills - our part numbers TMS and TMSX.  
		
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