Prime Day deals end soon! View Deals
Search  for anything...

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

  • Based on 423 reviews
Condition: New
Checking for the best price...
$32.97 Why this price?
Prime Day Deal · 18% off was $39.99

Buy Now, Pay Later


As low as $8 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Sunday, Jun 28
Order within 15 hours and 5 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Size: 12-Inch (1-Piece)


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: Stainless Steel


Product Dimensions: 11.91"L x 2.36"W


Color: Black


Handle Material: Stainless 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


Number of Items: 1


Brand Name: KLEIN TOOLS


Specific Uses For Product: Twisting


Model Number: D50512B


UPC: 092644730344


Manufacturer Part Number: D50512B


Manufacturer Warranty Description: Call vendor for warranty


Item Type Name: Pump Pliers


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


Unit Count: 1.0 Count


Manufacturer: Klein Tools


Item Dimensions L x W: 11.91"L x 2.36"W


Item Weight: 1.02 Pounds


Material Type: Stainless Steel


Handle Material: Stainless Steel


Color: Black


Grip Type: Ergonomic


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


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Jun 28

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
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Great feel, great value
Size: 7-Inch, 10-Inch (2-Piece Set)
I use these bad boys everyday, they are great. Took a little getting used to after using standard channelocks, but I much prefer them now. Much slimmer, better feel, more adjustability, better leverage. The real kicker is the locking adjustability which once you try it, you can’t go back. I’m sure the Knipex Cobras are better, but for the price these Klein pliers can’t be beat. ... show more
Reviewed in the United States on June 9, 2026 by Jacob

  • Great purchase!
Size: 7-Inch, 10-Inch, 12-Inch (3-Piece Set)
Great product. Arrived in a timely manner and ready to work.
Reviewed in the United States on May 17, 2026 by Elle Cooper

  • Great tool
Size: 7-Inch, 10-Inch (2-Piece Set)
They work very well and the andle of the tool feels great naw alignment is perfect for small tubes .
Reviewed in the United States on May 27, 2026 by Marvin

  • Quick Adjust feature Means less Adjustment Aggravation
Size: 7-Inch
The Quick Adjust feature makes this a great choice. So many pliers are so aggravating trying to adjust them to a particular size/position. You just push the button down and adjust to the size you want with these pliers.
Reviewed in the United States on June 8, 2026 by Charlie

  • Very useful.
Size: 7-Inch
These pliers fit perfectly in my belt tool kit. I found these to be one of my favorite tool to use good quality not junk.
Reviewed in the United States on June 7, 2026 by Robert Erwin

  • 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

  • Buy it it’s good
Size: 7-Inch, 10-Inch (2-Piece Set)
Ver good quality worth every penny. I use it everyday in my job.
Reviewed in the United States on May 11, 2026 by Celso Maldonado

  • Great quality tool. Easy to operate.
Size: 10-Inch
Professional plumber approved.
Reviewed in the United States on June 1, 2026 by Not Elvis

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...