5/16in Hex Shank, 4mm Hex Power Bit 72mmL

Genius Tools Hex Power Bit 4mm Size, 5/16 Inch Hex Shank, 72mm Length, Durable Construction - 297240 Professional Power Screwdriver Bit This 4mm hex power screwdriver bit is built for professional tool setups that require consistent fit, dependable torque transfer, and long service life. It features a 5/16 inch hex shank and a 72mm overall length for controlled reach in common power driving applications. Constructed from high speed steel and heat treated for durability, the bit is designed to resist corrosion while maintaining a tough exterior and strong core. Size markings are stamped for quick identification when organizing bits by drive type and dimension. Key Benefits 5/16 inch hex shank provides secure hold and efficient torque transfer. 4mm hex power bit profile supports precise engagement and reduced cam-out. 72mm overall length adds reach while maintaining stable, controlled driving. High speed steel construction offers strength, durability, and anti-corrosive properties. Heat-treated design delivers tough exterior with superior inner core strength. Stamped size marking enables fast identification and cleaner tool organization. Meets or exceeds ANSI standards for quality and professional-grade performance. Designed for professional technicians, it's made to perform over a lifetime of heavy use, while keeping selection and storage simple through permanent size identification.