Fractional Inch Size: 5/16-inch Premium Chrome Vanadium steel forged with a complete 10-step state of the art heat treatment process, constructed for serious professionals in high torque environment Constructed longer than most other standard-pattern wrenches, giving you more leverage and access to hard to reach areas Flawless chrome plating, achieved through thorough polishing and careful application of chrome protective plating, ensures durability and corrosion resistance 12-point WaveDrive box end transfers torque uniformly and prevents damaging and rounding of the bolt, 15-degree offset for knuckle clearance and working in tight spots