The BlueSpot Screw Extraction Bits are manufactured from carbon steel and feature a reverse thread. They are used to remove broken/damaged screws and bolts. Simply insert into pre-drilled hole within screw and operate drill in reverse to remove screw without damage to hole. The square end also allows use with a tap wrench. Suitable for screws 3-25mm diameter. https://elecena.pl/product/27272012/bluespot-tools-22304-screw-extractor-set-6-piece 2024-11-14 https://elecena.pl/product/27272012/bluespot-tools-22304-screw-extractor-set-6-piece 2025-03-16 https://elecena.pl/product/27272012/bluespot-tools-22304-screw-extractor-set-6-piece 2025-03-27 https://elecena.pl/product/27272012/bluespot-tools-22304-screw-extractor-set-6-piece 2025-09-03 https://elecena.pl/product/27272012/bluespot-tools-22304-screw-extractor-set-6-piece 2025-11-27