Proto Hollow Shaft Fractional Nut Driver - 5/16" X 2-3/4" J9210H-SBD

Proto's professional‑grade 5/16″ hollow shaft nut driver designed for industrial, automotive, maintenance, and assembly applications where standard nut drivers can’t reach. Featuring a full hollow shaft design that provides extended bolt clearance, this tool makes it easier to engage nuts on long studs or recessed fasteners. Built to meet ASME B107.110‑2012 professional hand tool standards with a durable polished chrome finish and ergonomic fluted handle, it delivers dependable strength and long service life for technicians and tradespeople.
Key Features
• Precision‑formed 5/16″ hex tip engineered for secure engagement and accurate fastening
• Hollow shaft design allows long bolts or threaded rods to pass through for hard‑to‑reach applications
• One‑piece hollow/round shank construction enhances strength and durability
• Ergonomic fluted handle with color coding for quick size identification
• Polished chrome finish resists corrosion and simplifies cleanup on the job
• Meets ASME B107.110‑2012 professional hand tool standard for quality and reliability
• Overall length ~6‑11/16″ with ~2‑3/4″ shank for balanced reach and torque control