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Red cushion-grip nut driver with chrome-plated shank and magnetic tip

Klein Tools

Klein Tools 646-1/4M 1/4 In 6 In Nut Driver

SKU CH-AZ1A-F3N61 MPN 646-1/4M

Hollow magnetic nut driver holds 1/4-inch fasteners on a 6-inch shank with a cushion grip

  • TypeNut Drivers
  • Color/FinishRed
  • FeaturesMagnetic Tip Corrosion Resistant Twist Resistant Cushion Gri
  • Handle MaterialChrome Plated
  • Magnetic tip holds fasteners securely during use
  • Hollow shank clears long bolts without obstruction
  • Cushion grip reduces hand fatigue on extended jobs
  • Corrosion-resistant finish protects against rust damage
  • Twist-resistant shaft prevents slippage under torque

1/4-Inch Magnetic Nut Driver

The Klein Tools 646-1/4M is a hollow-shaft nut driver designed for 1/4-inch fasteners. Its magnetic tip holds hardware securely during installation or removal. A cushion grip provides comfort and torque control for trade professionals and maintenance technicians. The 6-inch shank length offers reach into recessed assemblies.

Compatibility Checks Before Ordering

Verify that the fasteners you service are SAE 1/4-inch hex heads. Confirm that a 6-inch shank provides sufficient reach for your typical work depth. The tool is not insulated and is not rated for electrical work. Ensure the hollow shaft can clear any protruding bolt threads in your application.

Ideal For General Mechanical Work

Suits technicians who need a durable, magnetic driver for everyday hex fasteners. The hollow shaft accommodates long bolts without bottoming out. Buyers requiring insulated tools for live electrical panels should look elsewhere. Users needing metric sizes or a comprehensive driver set will need additional tools.

Highlights

  • Magnetic tip holds fasteners securely during use
  • Hollow shank clears long bolts without obstruction
  • Cushion grip reduces hand fatigue on extended jobs
  • Corrosion-resistant finish protects against rust damage
  • Twist-resistant shaft prevents slippage under torque

Specifications

BrandKlein Tools
Model646-1/4M
TypeNut Drivers
Color/FinishRed
FeaturesMagnetic Tip Corrosion Resistant Twist Resistant Cushion Grip
Handle MaterialChrome Plated

Questions about this item

What comes in the box and do I need to buy anything else?

The package includes the 646-1/4M nut driver with its magnetic tip, corrosion-resistant finish, twist-resistant construction and cushion grip. No additional parts are required for standard use.

Which version should I choose for a 1/4 in fastener?

This model is built for 1/4 in fasteners with a 6 in bolt clearance and hollow round shank, so it matches that size directly.

What does the 6 in bolt clearance mean when I am working?

The 6 in bolt clearance lets the hollow shank slide over longer threaded studs so you can drive or remove the nut without the stud bottoming out.

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