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KLEIN TOOLS

Klein Tools D50512B 12-Inch Adjustable Pliers, Quick-Adjust Klaw Pump Pliers, V-Jaw, Hardened Teeth for Maximum Torque

  • Based on 162 reviews
Condition: New
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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2026

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Availability: In Stock.
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Arrives Dec 21 – Dec 22
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Size: 12-Inch


Features

  • MAXIMUM TORQUE: Unique plier jaw design provides a strong, slip-free hold, allowing for maximum torque
  • ENHANCED GRIP: Equipped with hardened teeth, minimizing wear and ensuring a secure hold on objects
  • DURABLE CONSTRUCTION: Full-steel body for superior strength and long-lasting performance
  • QUICK ADJUST KLAW: Enables swift and effortless one-handed adjustment of plier jaws for quick adaptability
  • COMPACT DESIGN: Slender design allows for easy work in confined spaces

Description

The Klein Quick-Adjust Klaw Pump Pliers feature a unique curved jaw with multiple contact points, delivering maximum torque and a secure grip. The hardened teeth on the jaw's gripping surface minimize wear and provide a strong, positive hold. Its all-steel construction ensures exceptional strength and long-lasting performance, even in the most demanding tasks. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.

Brand: KLEIN TOOLS


Material: Alloy Steel


Product Dimensions: 11.91"L x 2.36"W


Color: Black


Handle Material: Alloy Steel


Item Weight: 1.02 Pounds


Specific Uses For Product: Twisting


Specification Met: Likely meets relevant industry standards, but no specific certifications mentioned


Grip Type: Ergonomic


UPC:


Brand: ‎KLEIN TOOLS


Material: ‎Alloy Steel


Product Dimensions: ‎11.91"L x 2.36"W


Color: ‎Black


Handle Material: ‎Alloy Steel


Item Weight: ‎1.02 Pounds


Specific Uses For Product: ‎Twisting


Specification Met: ‎Likely meets relevant industry standards, but no specific certifications mentioned


Grip Type: ‎Ergonomic


UPC: ‎092644730344


Manufacturer: ‎Klein Tools


Part Number: ‎D50512B


Item Weight: ‎1.02 pounds


Item model number: ‎D50512B


Size: ‎12-Inch


Item Package Quantity: ‎1


Included Components: ‎Quick-Adjust Klaw™ Pump Pliers, 12-Inch


Batteries Required?: ‎No


Date First Available: February 6, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Dec 21 – Dec 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Klein Quality
Size: 10-Inch
The quick adjustment is great. Not as clumbersom as regular slip joint pliers. As always Klein quality.
Reviewed in the United States on October 27, 2025 by Larry J. Parks
    • Amazon is legit
Size: 7-Inch
That it’s a great tool and was delivered swiftly.
Reviewed in the United States on October 27, 2025 by Derek Reader
    • It’s convenient
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This tool is worth buying very convenient I have no problem with it try it you won’t regret it Klein is my type of tool
Reviewed in the United States on October 13, 2025 by Veron Dorsett
    • Awesome
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Reviewed in the United States on October 24, 2025 by Troy Vilardo
    • Not your average channel locks
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It’s good to use for just about anything you’d need channel locks for. The style is cool and its functionality is out of the norm for your standard channel lock. The adjustability of these channel locks work well for those who don’t like opening and having to readjust the locks, they don’t slip or break easily and are easy to carry around. I use them for industrial work so they’re convenient for myself but as I said previously, they’re not your average channel locks. You have to push down on a button to unlock them and be able to adjust them, once you have it at your desired spot, you let go of the button and it clicks into place and boom. Ready to use. Now the sizes do matter since the bigger ones give you more leverage but keep in mind the thickness of the tool as it can easily be a bit heavy if you’re carrying more than just channel locks in your bag. Overall, I give it a solid 5 stars. I use them daily and I don’t have a slippage problem anymore. ... show more
Reviewed in the United States on October 23, 2025 by Gerardo Villarreal
    • Excelente
Size: 7-Inch
Excelente producto
Reviewed in the United States on October 18, 2025 by jabdcucho
    • Working man’s pump pliers!!!
Size: 10-Inch
They work well so far. I’m in industrial maintenance and I work with every style of metal pipe you can imagine every day. Cast. Copper. Stainless. Plastic. Centrifugal pumps. Stainless food equipment. Here is what I can say after about a month of owning them. These aren’t Knipex cobras. They’re not quite as smooth and refined. But at half the price. They work GREAT. They grip on to things very very well. I literally wore the jaws out on my last pair of cheap pliers. These have performed very well. The adjustment works well, however not quite as finite or slick as the Knipex. The handle design overall fits in the hand well and it comfortable enough to be used however you need to use them. The quality seems pretty good and bottom line. These things work well. If you’re hung up on price and don’t want to spring for the Knipex. These are definitely a viable replacement. ... show more
Reviewed in the United States on May 8, 2025 by Amazon Customer
    • Great
Size: 2-Piece Set
Great tool
Reviewed in the United States on October 17, 2025 by Treasure

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