SKU: 21207020979

Klein Tools 68310 Ratcheting Refrigeration Wrench, 3/16 & 5/16 in. Square x 1/4 & 3/8 in. Square

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Description

Klein Tools 68310 Ratcheting Refrigeration Wrench, 3/16 & 5/16 in. Square x 1/4 & 3/8 in. SquareRatcheting Refrigeration Wrench (3 165 16 x 1 43 8 in.) This compact, reversible ratcheting wrench from Klein Tools is engineered for refrigeration packing gland nuts, valve stem sockets, and beam clamp installations. It features four clearly marked square socket sizes and a chrome plated, rugged build for lasting performance. Key Features: 4 in 1 Square Sockets: 3 16, 5 16, 1 4, and 3 8 in. sizes clearly marked for quick identification Instant

Ratcheting Refrigeration Wrench (3/16–5/16 x 1/4–3/8 in.)

This compact, reversible ratcheting wrench from Klein Tools is engineered for refrigeration packing gland nuts, valve stem sockets, and beam-clamp installations. It features four clearly marked square socket sizes and a chrome-plated, rugged build for lasting performance.


Key Features:

  • 4-in-1 Square Sockets: 3/16, 5/16, 1/4, and 3/8 in. sizes clearly marked for quick identification
  • Instant Reversal: Quick-flip reversing lever enables fast ratchet direction changes
  • Durable Construction: Laminated build with smooth edges and chrome-plated finish for rust resistance
  • Compact Design: Slim profile reaches tight spaces commonly found in HVAC and refrigeration work
  • Made in USA: Quality manufacturing you can trust

Specifications Table:

Specification Details
Model Number 68310
Hand Tool Type Box-End Wrench
Wrench Type Ratcheting
Features Reversible
Measurement Standard SAE
Individual/Set Individual
Number of Pieces 1
Socket Sizes 3/16 in. square, 5/16 in. square, 1/4 in. square, 3/8 in. square
Construction Laminated for strength; smooth edges
Finish Chrome-plated for rust resistance
Reversing Mechanism Quick-flip reversing lever
Country of Origin USA

Frequently Asked Questions (FAQ):

Q: What applications is this wrench designed for?
A: It’s designed for refrigeration packing gland nuts, valve stem sockets, and beam-clamp installation.


Q: How do I reverse the ratcheting direction?
A: Use the quick-flip reversing lever to instantly change the ratchet direction.


Q: What socket sizes are included?
A: Square sockets in 3/16 in., 5/16 in., 1/4 in., and 3/8 in.


Q: Is it suitable for tight spaces?
A: Yes, its compact profile makes it ideal for confined areas in HVAC and refrigeration systems.


Q: Where is it made?
A: Made in the USA.


Precision in a Pocket-Sized Powerhouse

Sleek and purposeful, this Klein Tools refrigeration wrench slips into tight mechanical moments with grace. The chrome-plated finish and clearly marked sockets deliver a refined, professional aesthetic. Style it alongside a curated HVAC toolkit—each piece selected for performance and polish. It’s a small luxury that elevates everyday work to an art form.


Equip your HVAC toolkit with this compact, reversible 4-in-1 wrench for faster, cleaner installs.

Warranty

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 21207020979

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Jacob Donkin
Lexington, US
★★★★★ 5
Gripping and Informative, a Must-read
Format: Hardcover
As someone who struggles to finish books in their entirety, I found Our Final Invention by James Barrat highly readable, deeply informative, and utterly gripping. The book contains a powerful message: through competition, distrust, desire and curiosity, humans will inevitably create an artificial intelligence (AI) that rivals or surpasses our own. Thus, it is wise and necessary to invest now in mitigation efforts and potential safeguards -- increased research and advocacy for AI risk and, most importantly, producing friendly AI. Barrat covers a lot of ground, but his main argument is summarized as follows: Currently, we humans regularly utilize narrow AI technology (technology capable of achieving specific, programmed goals through unassisted human computing -- Siri, Google search, IBM's Watson, etc). We are also experimenting with "black box" tools and techniques (programs where inputs and outputs are understood and measurable, but the processes in between aren't -- genetic algorithms/programming and software that writes better software) and artificial neural networking (ANN), as seen through efforts to reverse engineer the human brain. And, below the surface, there is an ongoing race between world powers (driven mainly by national security, defense, and international business interests) and guided by AI developers to develop and achieve artificial general intelligence (AGI) -- human-level artificial intelligence. The problem is that once AGI is achieved it will be very difficult to manage, and may very well result in the manifestation of artificial super intelligence (ASI) -- greater than human-level intelligence. ASI could theoretically become thousands of times smarter than the smartest human being alive. It won't think like us, won't want to be ruled by us, and, most crucially, it won't want to be turned off. In fact, ASI would likely regard us as potential fuel for its quest to duplicate and improve itself exponentially in order to achieve its goals. Throughout the book, Barrat refers to interesting psychological phenomena and concepts (such as the normalcy bias), while drawing on personal experiences, historic events, and interviews with computer programmers, inventors and philosophers, to tactfully illustrate how progress in AI development is dangerously rapid. Adequate checks and balances are not in place to deal with a non-ideal intelligence explosion or hard take-off (AGI quickly leading to ASI). I highly recommend this book to anyone interested in learning about both human beings and the advancement of machines. I suspect that the prominence of AI, as a research field and topic for discussion, will only increase in time (it already has in recent years -- drones, smart technology, Wall Street high frequency trading (HFT), financial modeling), making Our Final Invention a valuable guide or stepping stone for anyone trying to understand our world and the path of the future.
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Reviewed in the United States on July 3, 2014
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Ashley Sutton
Port Orchard, US
★★★★★ 5
Great book
Format: Hardcover
We love the FGTEEV books!
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Reviewed in the United States on May 31, 2026
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Krissy Miller
Phoenix, US
★★★★★ 5
FGTeeV:
Format: Hardcover
The 11 yr old loves it.
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Reviewed in the United States on May 17, 2026
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Rebecca Leary
Belleville, US
★★★★★ 5
Perfect, hardback!!!
Format: Hardcover
Bought this book for my teens. They love it. Perfect hardback quality for the price. They have the whole series
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Reviewed in the United States on May 5, 2026
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Ray
Bozeman, US
★★★★★ 5
perfect book
Format: Hardcover
awesome book
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Reviewed in the United States on May 11, 2026

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