The 5/16" hex bit (approximately 7.94mm interface), a medium-duty professional tool accessory, is renowned for its high torque capacity, strong adaptability, and durability. It is widely used in high-intensity applications such as automotive repair and heavy machinery assembly.

Complying with the ISO 2380 standard hexagonal structure, the bit maintains a side length tolerance of ±0.03mm, ensuring a tight engagement with M6-M8 screw slots. Its torque transmission efficiency is 30% higher than Phillips bits, capable of withstanding a maximum torque of 22N·m. The thickened edges and rounded corner design reduce stress concentration, preventing slippage caused by edge wear and enabling stable operation even on hard materials like alloy steel.

Crafted from high-quality S2 alloy steel or chrome-molybdenum-vanadium steel, the bit undergoes quenching and tempering to achieve a hardness of HRC58-62. With black oxide treatment or nickel plating, it passes a 96-hour salt spray test, ensuring rust resistance in harsh environments like damp workshops and outdoor construction sites. Premium models feature a magnetic head design (suction force ≥4N) to securely hold M6-M8 screws, minimizing the risk of part loss during overhead or confined-space operations.

The 7.94mm interface is compatible with most electric wrenches, pneumatic screwdrivers, and manual ratchet wrenches. Combined with a quick-release chuck, bit replacement is 50% faster than traditional threaded connections. The anti-slip knurling on the hexagonal shank provides a secure grip even when wearing gloves, reducing hand fatigue during prolonged use. Whether pre-tightening car tire screws or fixing outdoor iron frames, the 5/16" hex bit is an ideal choice for professional technicians and hardcore DIY enthusiasts tackling medium-intensity tasks.