BOSCH TITANIUM-COATED METAL DRILL BITS HAVE BEEN DESIGNED TO SATISFY THE NEEDS OF HVAC OR FACILITY MAINTENANCE TECHNICIANS CONTRACTORS AND OTHER PROS WHO NEED SOLID RELIABLE BITS FOR GENERAL-APPLICATION DRILLING IN HIGH-CARBON STEEL AND LIGHT-GAUGE METAL AS WELL AS WOOD AND PLASTIC. THE SPLIT-POINT TIP HAS BEEN ENGINEERED FOR NO-SKATE STARTS AND CLEAN ACCURATE HOLES. THE BIT PROVIDES 2X LONGER LIFE THAN STANDARD DRILL BITS THANKS TO THE TIP DESIGN AND TITANIUM COATING. THE THREE-FLAT SHANK DESIGN ON BITS 3/16 IN. AND LARGER PROMOTES BETTER GRIPPING AND GUARDS AGAINST SLIPPING. COLOR GOLD MATERIAL TITANIUM NITRIDE COATED