Sealey 25 piece titanium coated metric drill bit set sealey ak4725 high quality hss titanium coated drill bits designed to reduce friction and heat quicker swarf clearance from the drills cutting edge produces a superior quality of finish compared to normal hss drills ideal for use on stainless steel copper and high carbon steels supplied in display case sealey ak4725 drill bit set 25pc titanium coated metric