Premium MaterialDiyife Screw Extractor Kit manufactured by high hardness H.S.S., rust resistant, preservative. Wearable for long lasting performance. The kit includes 10 drill bits (Dr 1- 10), 10 extractors (EX 1- 10), 1 extended bit holder and 1 socket adapter22 Pcs- Works With Any Drill And Any Size Screw or Bolt Suitable for hexagon socket bolts, square head screws, wood screws, hexagon head screws, mechanical screws, sheet metal screws and other screws. Complete size easy out bolt extractor set and can meet your unique needs.Easy to UseUse a drill bit to drill a deep hole in the screw head and then reverse the screw extractor counterclockwise into the damaged screw until it releases,you can easily remove the rusty, broken, viscose screw in seconds.Compact- Provide A Storage BoxScrew rsemover sets are packaged in a storage box for easy carrying and storage. You don't have to worry about losing the parts.