Klein Tools 646-1/4M 1/4-Inch ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$67.86
$13.53
Klein Tools 646-1/4M 1/4-Inch Magnetic Tip Nut Driver 6-Inch Shaft

Klein Tools 646-1/4M 1/4-Inch Magnetic Tip Nut Driver 6-Inch Shaft

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Model: 646-1/4M
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$67.86
$13.53
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1/4-Inch Magnetic Tip Nut Driver 6-Inch Shaft

  • Warnings

    • NOT insulated. Will NOT protect against electrical shock.
    • Always wear approved eye protection.

  • Features

    • Internal flanges provide solid, twist-resistant shank anchor
    • Hollow shaft facilitates work on bolt applications
    • Made in USA
    • Cushion-Grip™ handle allows for greater torque and comfort and handle end is color coded for easy identification
    • Exclusive hollow shaft design with Rare-Earth magnetic tip features unobstructed pass through, even on long bolts


646-1/4M - spec sheet

Manufacturer Resources

Product Specs

Color Code:
Red
Insulated:
No
Magnetic:
Yes
Measurement Standard:
SAE
Nut Driver Sizes:
1/4"
Overall Length:
9.75" (24.8 cm)
Shaft Length:
6" (15.2 cm)
Department:
Electrical
Product Group:
Hand Tools
Product Subgroup:
Screwdrivers & Drivers
Product Height:
1.0000 in
Product Weight:
0.2500 lbs
Product Width:
1.0000 in
Product Depth:
9.7500 in
Product Type:
Nut Driver

Klein Tools 646-1/4M – Frequently Asked Questions

1) Can the Klein 646-1/4M nut driver be used on live electrical work?
No. The 646-1/4M is not insulated and will not protect against electrical shock, so it is not for live work. Treat it as a general bolt and hex-head driver on de-energized circuits, and wear approved eye protection. If you need a driver for energized work, you need a 1000V insulated nut driver instead.
2) Will this nut driver work on a long threaded rod or long bolt sticking through?
Yes, that is what the hollow shaft is for. The 646-1/4M has a 6 inch hollow shaft that lets a long bolt or threaded rod pass straight up through the driver, so you can keep turning a nut well down the thread. The rare-earth magnetic tip still holds the nut while you start it.
3) How deep can the Klein 646-1/4M reach into a recessed box or panel?
The shaft is 6 inches long, with an overall tool length of 9.75 inches including the handle. That gives you reach into deep panels, strut channel, and recessed junction boxes where a stubby driver bottoms out on the handle.
4) How do I tell my 1/4-inch Klein nut driver apart from the other sizes in my pouch?
By handle color. The 646-1/4M has a red color-coded handle end, so the 1/4 inch size is identifiable at a glance in a pouch of same-shaped drivers. The Cushion-Grip handle also gives you more torque than a bare plastic handle.
5) Will the shank on this Klein nut driver spin loose in the handle under torque?
The 646-1/4M uses internal flanges in the handle that anchor the shank against twisting, which is the usual failure point on a cheap nut driver when you lean on a tight nut. The tool is made in the USA and weighs 0.25 lbs.
6) Is the Klein 646-1/4M the same as a hollow-shaft 1/4-inch nut driver ordered by part number for a tool crib?
Yes. Order it as Klein Tools 646-1/4M. That number covers the 1/4 inch SAE magnetic-tip hollow-shaft driver with a 6 inch shaft, which is the single configuration this model comes in.
How fast can I get the Klein Tools 646-1/4M delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Klein Tools 646-1/4M come with a warranty?
Absolutely. The Klein Tools 646-1/4M is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Klein Tools 646-1/4M?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Klein Tools 646-1/4M from ZenSupply?
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