GEARWRENCH 8mm [5/16"] Bolt Biter Nut Extractor & Driver - 86177

Features: 

• Bi-directional design for removing or tightening damaged fasteners.
  
• Tapered entry easily seats on a damaged fastener.
  
• Dual sized sockets designed to work with both SAE and metric fasteners.
  
• Torsion zone offers up to 50x longer life in high torque impact applications.
  
• Chrome molybdenum alloy steel (Cr-Mo) for exceptional strength and long lasting durability.
  
• High-visibility laser etched markings provide quick size identification.
  
• Black oxide finish to resist corrosion.
  
• Minus-size sockets fit a wider range of damaged fasteners.

Details: 

The GEARWRENCH Bolt Biter™ nut drivers are designed with innovative features to grip rounded out, frozen, and damaged fasteners. The revolutionary Bolt Biter™ gripping design is bi-directional, seats quickly and safely on fasteners, and removes easily from fasteners after use. Bolt Biter™ nut drivers offer an impact ready option that delivers extreme durability. Bolt Biter™ technology redefines extraction by gripping rounded fasteners rather than cutting into them, which means these nut drivers last 50x longer than competition.