Klein Tools 661 Screwdriver, #...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$64.57
$11.89
Klein Tools 661 Screwdriver, #1 Square Recess Tip, 4-Inch Shank

Klein Tools 661 Screwdriver, #1 Square Recess Tip, 4-Inch Shank

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Model: 661
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$64.57
$11.89
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Screwdriver, #1 Square Recess Tip, 4-Inch Shank

  • Warnings

    • Do NOT use to pry or chisel.
    • Always wear approved eye protection.
    • NOT insulated. Will NOT protect against electrical shock.

  • Features

    • Meets or exceeds applicable ASME / ANSI specifications
    • Special heat-treated, chrome plated shaft for smooth feel and corrosion resistance
    • Made in USA
    • Cushion-Grip™ handle for greater torque and comfort
    • Precision-machined tip for exact fit
    • Works on most combination head receptacle, switch and panel screws
    • Internal flanges inside handle provide solid, twist-resistant blade anchor
    • Tip-Ident® color-coded handle end quickly identifies the screwdriver type and tip orientation


661 - spec sheet

Manufacturer Resources

Spec Sheet

Product Specs

Color Code:
Green
Handle Color:
Black
Insulated:
No
Item Depth:
7.7500 in
Item Height:
1.0000 in
Item Weight:
0.2000 lbs
Item Width:
1.0000 in
Magnetic:
No
Overall Length:
7.75" (19.7 cm)
Shank Length:
4" (10.2 cm)
Shank Type:
Round
Tip Size:
#1
Tip Type:
Square-Recess
Department:
Electrical
Product Group:
Hand Tools
Product Subgroup:
Screwdrivers & Drivers
Product Material:
Steel
Product Weight:
3.2 oz (91 g)
Product Type:
Screwdriver
Country of Origin:
United States
Product Width:
1 in
Product Depth:
7.75 in
Product Height:
1 in

Klein Tools 661 – Frequently Asked Questions

1) Is the Klein Tools 661 screwdriver safe to use on live electrical circuits?
No. The Klein 661 is not insulated and will not protect against electrical shock, so de-energize the circuit before working. If you need to work on or near energized conductors, you need a screwdriver rated and marked as insulated, not this one. Klein does note eye protection should be worn, and the tool is not meant for prying or chiseling.
2) What size square recess (Robertson) screws does the Klein 661 driver fit?
It is a #1 square-recess tip, which is the common size for receptacle, switch and panel screws with combination heads. A #2 square tip will not seat correctly in a #1 recess, so match the size before you start driving device screws.
3) Will a 4-inch shank screwdriver reach device screws down in a deep electrical box?
The 661 has a 4 inch (10.2 cm) round shank and a 7.75 inch (19.7 cm) overall length, which clears the yoke of a device sitting in a standard box and lets you keep your knuckles off the wall plate. For very recessed or obstructed screws you would want a longer shank version instead.
4) Does the Klein 661 hold screws magnetically?
No, the tip is not magnetized. It is precision-machined for a tight fit in the recess, which is what keeps the screw on the driver, but you cannot pick up a dropped screw with it. If one-handed screw retention matters on ladder work, choose a magnetic-tip driver or a bit holder.
5) Will the blade twist loose in the handle under high torque?
The blade is anchored by internal flanges molded inside the handle, which resist the blade spinning in the grip when you lean on a stubborn screw. The shaft itself is special heat-treated steel with chrome plating for corrosion resistance, and Klein states the driver meets or exceeds applicable ASME/ANSI specifications. Still not a pry bar or chisel.
6) How do I tell the square-recess Klein drivers apart in a pouch full of screwdrivers?
Klein's Tip-Ident color coding sits on the handle end. On the 661 that marker is green against a black Cushion-Grip handle, so you can spot the tip type and its orientation without pulling the tool out and squinting at the blade.
7) What is the exact Klein part number and how much does the tool weigh for a tool-kit spec?
Order it as Klein Tools 661. It weighs 3.2 oz (91 g), which is what you want for the line-item weight when you are building out a standardized electrician kit or MRO stock list. Made in USA.
How fast can I get the Klein Tools 661 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 661 come with a warranty?
Absolutely. The Klein Tools 661 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 661?
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 661 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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