4 Pc. Bolt Biter Screw Extractor Set Compatible with fastener sizes ≤ 1/4” – 5/8” and M5-M16. Bi-directional design loosens or tightens damaged fasteners. High-visibility markings for easy size identification. Hex base design is compatible with hand and power tools. Compact storage solution for space-saving organization . Tapered side and tip cutting edges for powerful and consistent extraction . High strength steel provides up to 50 times longer life . Black oxide coating provides superior corrosion resistance 84787