* Includes 17, 19, and 21 mm twist sockets for common passenger cars, SUVs, and light trucks
* Carbon fiber sleeves reinforce the socket body to help resist expansion under extreme torque
* Higher torque are helpful for removing extremely rusted, seized wheel fasteners
* Can be operated with an impact wrench
* When removing a seized lug nut, the socket experiences several stresses:
1. Torsional stress - twisting from the wrench (Fig 1)
2. Radial expansion - socket wall tries to expand outward (Fig 2)
3. Stress concentration - flute edges / teeth are likely to crack (Fig 3)
4. When carbon fiber sleeves are added, the socket wall stays rigid, teeth stay engaged, and the sleeves help resist expansion, thereby increasing torque resistance (Fig 4).
