Klein Tools Magnetic Nut Drive...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$84.01
$49.96
Klein Tools 646M Nut Driver Set, Magnetic Nut Drivers, 6-Inch Shafts, 2-Piece

Klein Tools Magnetic Nut Driver Set with Cushion-Grip Handles, 6-Inch Shafts, 2-Piece Professional Tool Set

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

$84.01
$49.96
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Klein Tools Magnetic Nut Driver Set with Cushion-Grip Handles, 6-Inch Shafts, 2-Piece Professional Tool Set

Professional magnetic nut drivers with enhanced grip and rare-earth magnetic tips

Klein Tools delivers professional-grade magnetic nut driver performance with this 2-piece set featuring 6-inch shafts and Cushion-Grip� handles. This general purpose selection includes the most frequently used nut drivers (1/4" and 5/16") with full-hollow shaft design and rare-earth magnetic tips for superior bolt application work. Color-coded handles provide easy identification while internal flanges ensure solid, twist-resistant shank anchoring for reliable professional use.

Professional Features & Benefits

  • Rare-Earth Magnetic Tips: Full-hollow shaft design with powerful magnets facilitates secure fastener handling and reduces dropped hardware
  • Cushion-Grip� Handles: Enhanced grip design allows for greater torque application and improved comfort during extended use
  • 6-Inch Shaft Length: Optimal reach for accessing recessed fasteners while maintaining control and precision
  • Color-Coded Identification: Handle ends feature color coding for quick size identification and improved workflow efficiency
  • Internal Flanges: Solid twist-resistant shank anchor design prevents handle separation under high torque applications
  • Made in USA: Klein Tools manufacturing quality ensures consistent performance and durability for professional applications
  • SAE Measurement Standard: Standard sizing compatibility with common fastener applications across electrical and general trades

Technical Specifications

  • Department: Electrical
  • Depth: 9.7500 in
  • Handle Type: Cushion Grip
  • Height: 1.2500 in
  • Insulated: No
  • Measurement Standard: SAE
  • Number Of Pieces: 2
  • Overall Length: 9.75" (24.8 cm)
  • Product Group: Hand Tools
  • Product Subgroup: Screwdrivers & Drivers
  • Shaft Length: 6" (15.2 cm)
  • Weight: 0.5000 lbs
  • Width: 4.7500 in

Professional Applications

  • Electrical panel and junction box assembly
  • HVAC equipment installation and maintenance
  • Commercial and residential electrical work
  • Industrial equipment servicing
  • Appliance installation and repair
  • General mechanical fastening applications
  • Professional trade and maintenance operations

Why Choose Klein Tools Quality?

Klein Tools delivers proven reliability with Made in USA manufacturing quality and professional-grade construction. The non-insulated design requires proper safety protocols, and users should always wear approved eye protection during operation. This 2-piece set provides essential nut driver functionality with enhanced magnetic performance and ergonomic design for demanding professional applications.

Manufacturer Resources

Spec Sheet

Product Specs

Handle Type:
Cushion Grip
Insulated:
No
Measurement Standard:
SAE
Number Of Pieces:
2
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:
1.2500 in
Product Weight:
0.5000 lbs
Product Width:
4.7500 in
Product Depth:
9.7500 in
Product Type:
Operating Handle

Klein Tools 646M – Frequently Asked Questions

1) What sizes come in the Klein Tools 646M magnetic nut driver set?
The Klein 646M is a 2-piece set covering the two most-used SAE sizes, 1/4 inch and 5/16 inch. Sizing is SAE, not metric, so it matches the hex head sheet metal screws and self-drillers you see in panel and duct work rather than metric fasteners.
2) Can I use these Klein nut drivers on live electrical work?
No. The 646M drivers are non-insulated, so they are not rated for live work. For energized circuits you need drivers marked as insulated to 1000V. The 646M is for de-energized panel assembly, HVAC equipment, and general fastening.
3) Will these nut drivers reach over a long bolt or threaded rod?
Yes. Both drivers use a full-hollow shaft, so a long screw or threaded rod passes up through the shaft instead of bottoming out. Shaft length is 6 inches (15.2 cm), with 9.75 inches (24.8 cm) overall including the handle, so you get depth without losing control on recessed fasteners.
4) Does the magnet in these drivers actually hold a screw, or just a steel nut?
The tips use rare-earth magnets, strong enough to hold a hex head screw or nut in the socket while you start it one-handed overhead or inside a box. That is the main reason to pick the 646M over a plain hollow-shaft driver: fewer dropped fasteners in a junction box or a duct run.
5) Is a 2-piece 1/4 and 5/16 nut driver set enough, or should I buy a full set?
For electrical and HVAC work, 1/4 and 5/16 cover most hex head sheet metal screws and ground screws, which is why Klein built the 646M around just those two. If you also service equipment with larger hex hardware, 3/8 and 11/32 sizes are common gaps, and you would want a larger multi-piece nut driver set instead. The 646M is the pouch-sized pair, at half a pound total.
6) How do I tell the two drivers apart quickly in a pouch?
The handle ends are color coded by size, so you pick the 1/4 or the 5/16 without reading the shaft. The handles are Cushion-Grip, which gives more turning torque than a bare plastic handle, and internal flanges anchor the shank so the handle will not spin loose under load.
7) What is the Klein part number for this magnetic nut driver set?
Order it as Klein Tools 646M. That covers the complete 2-piece magnetic set with 6-inch shafts and Cushion-Grip handles, so there is nothing else to specify when you order.
How fast can I get the Klein Tools 646M 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 646M come with a warranty?
Absolutely. The Klein Tools 646M 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 646M?
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 646M from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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