Tackle tough drilling jobs with the all new Astro Tools TS7 – ONYX 7-Piece TurboStep Aircraft Extension Length Drill Bit Set. This 1/8" to 1/2" set by 1/16" increments brings the standard "Aircraft Length" drill bit set useful on recessed workpieces or extra thick material into the 21st century with our high performance patented TurboStep design which features a unique stepped design that outperforms conventional bits in every material. Each bit is precision ground from heat-treated M2 High-Speed Steel and coated with Onyx oxide to prevent chip build-up and ensure smooth drilling. These extra-long bits provide exceptional reach for drilling deep holes, working in confined spaces, or penetrating extra-thick materials. Whether you're drilling through hard alloys, sheet metal, or imperfect surfaces, the TS7 Drill Bit Set delivers superior performance and versatility for all your drilling needs.