TITANIUM PLATING - increases the hardness of each bit to help them penetrate tough metals, stay sharp longer and resist rust and corrosion. 5-PIECE SCREW EXTRACTOR SET - includes a screw extractor bit to remove all common sizes of damaged, stripped or broken screws. HIGHEST QUALITY - This damaged screw remover tool kit is made from high hardness H.S.S. 4341 (the hardness is 63hrc)alloy steel, durable for extracting stripped, broken, stuck or damaged screws. EASY TO USE - set your drill to reverse/counterclockwise and use a slow drill speed. Begin the extraction by using the drill bit/burnishing tip and drill down to create a clean hole. Switch the drill bit to the extraction tip and using consistent, downward pressure (and a slow speed) allow the extraction tip to bite into the damaged screw. MUST-HAVE TOOL - whether you are a handyman, handywoman or contractor, screws sometime get damaged or broken. Keep this set in your toolbox to get the damaged screw out and your project back on track.