70550 Hex Wrench Key Set, 11 SAE Sizes

Professional grade extended reach folding hex set for heavy duty mechanical work

Full manufacturer title

Klein Tools 70550 Hex Wrench Key Set, 11 SAE Sizes, Heavy Duty Folding Allen Wrench Tool with Extra Long Hex Keys 11-Key SAE

Member of The 90+ Clubscored 90+ out of 100

Typical price

$20

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Klein Tools 70550 Hex Wrench Key Set, 11 SAE Sizes, Heavy Duty Folding Allen Wrench Tool with Extra Long Hex Keys 11-Key SAE image 1

Ravvy verdict

93.5 / 100

Buy this if you need professional torque and deep reach in a portable format, though be prepared for its bulkier than average size.

Best for: HVAC technicians and industrial maintenance professionals
Buy it if: You want extended blades reach deeply recessed fasteners.
Skip it if: You are minimalist cyclists or hobbyists with very small toolboxes.
Best alternative: Klein Tools 32500 11-in-1 Screwdriver/Nut Driver Set, 8 Bits (Phillips, Slotted, Torx, Square), 3 Nut Driver Sizes, Cushion Grip Handle (professional electricians and maintenance technicians)

How it scores on what matters

Reach98.0
Material Strength95.0
Torque Leverage94.5
Tool Selection92.0
Portability75.0

Ravvy factor scores, 0 to 100, derived from specs, owner reviews and category norms.

What it is

The Klein Tools 70550 stands out in a crowded market by solving the primary weakness of folding hex keys: reach. Unlike standard pocket sets that struggle with recessed fasteners, this heavy duty tool features elongated blades ranging up to 4.5 inches. Each key is crafted from heat treated alloy steel with square cut ends, ensuring a precise fit that minimizes the risk of stripping expensive hardware. The reinforced nylon handle provides a substantial grip that allows for significant torque without the tool flexing or feeling flimsy in the hand. While this set is larger than your typical pocket tool, the trade off is massive versatility and durability. The 11 SAE sizes cover everything from fine adjustments to heavy machinery maintenance. The keys rotate independently up to 270 degrees, allowing you to work at awkward angles or use the handle as a T-handle for maximum leverage. It is a purpose built tool for professionals who need the convenience of a folding set but the performance of individual long arm keys.

Ravvy AI insight

Compared to budget competitors, Klein uses a significantly higher grade of nylon reinforcement in the chassis which prevents the 'wandering blade' issue common in cheaper sets. The inclusion of the 1/2 inch key is rare for folding sets and indicates this tool is intended for high torque applications rather than precision electronics. If you frequently work with recessed bolts in motor housings, the 4.5 inch blade length makes this an essential upgrade over standard 2 inch folding sets.

Generated from owner feedback, product specs, pricing, and retailer data. Last updated Aug 18, 2026.

What owners praise

Extended blades reach deeply recessed fasteners
Heat treated alloy steel prevents rounding of tips
Independent 270 degree blade rotation
High leverage handle design
Comprehensive SAE range including 1/2 inch size
Durable reinforced nylon housing

What to know first

Noticeably heavier than standard folding sets
Bulkier profile takes up more pocket space
Stiff hinges out of the box

Specifications

UPC: 363921746656 363921746649 359741319705 359741319699 359741319712 092644332845 363921746663
GTIN: 363921746656 363921746649 359741319705 359741319699 359741319712 092644332845 363921746663
Brand: KLEIN TOOLS
Color: Orange
Material: Handle: Reinforced Nylon; Keys: Steel
Set Name: 11-Piece
End Style: Hang Hole
Brand Name: KLEIN TOOLS
Head Style: Hex
Unit Count: 1 Count
Item Length: 6.63 inches
Item Weight: 16 ounces
Finish Types: Brushed
Manufacturer: Klein Tools
Model Number: 70550
Material Type: Handle: Reinforced Nylon; Keys: Steel
Item Type Name: Klein Tools 70550 Pro Hex Key Set, 11 SAE Sizes, Heavy Duty Folding Allen Wrench Tool with Extended Length Keys
Operation Mode: Mechanical
Number of Items: 1
Package Quantity: 1
Included Components: (11) Fractional Inch-Sized Keys
Wrench Length Style: Extra Long
Measurement Standard: SAE (Inch)
Manufacturer Part Number: 70550
Manufacturer Warranty Description: 1 Year Manufacturer
Global Trade Identification Number: 00092644332845

How to get the most out of it

Adjusting Hinge Tension

If the blades become too loose or are difficult to open, you can adjust the tension of the folding mechanism using a separate wrench on the through-bolt. Aim for a tension where blades stay put but can be moved with one hand.

Ownership tips

tip

Maximize Your Leverage

Lock the blade at a 90 degree angle to the handle to use the tool as a high torque wrench. This utilizes the reinforced nylon grip to its full potential when breaking loose stubborn or rusted bolts.

care

Prevent Surface Corrosion

Although the steel is high quality, it can show surface rust if left in damp tool bags. Occasionally wipe the blades with a light coat of machine oil to maintain the brushed finish and smooth rotation.

Frequently asked questions

Does this set include metric sizes?

No, the 70550 model is strictly SAE fractional inch sizes. Klein Tools offers a separate model with a blue handle for metric requirements.

How long are the actual hex blades?

The blades range from approximately 3.5 inches to 4.5 inches depending on the specific key size, which is significantly longer than standard 2 inch folding sets.

Can I replace an individual blade if it breaks?

While the set is held together by a bolt, Klein generally does not sell individual replacement blades for their folding sets. However, the high strength alloy steel is designed to withstand professional use without snapping.

Is this tool small enough to carry in a pocket?

It is quite large and weighs about one pound. While it can fit in a large work pant pocket, it is better suited for a tool belt or a toolbox due to its length and weight.

Where can you buy the 70550 Hex Wrench Key Set, 11 SAE Sizes?

70550 Hex Wrench Key Set, 11 SAE Sizes is sold through Amazon, and KLEIN TOOLS also lists it through its own site and major retail partners. The buy link on this page goes straight to the current Amazon listing, which is where stock and pricing update most often.

How much does the 70550 Hex Wrench Key Set, 11 SAE Sizes cost?

The last price Ravvy recorded was $20. Retail pricing on hand tools moves with promotions and stock, so treat that figure as a reference point and check the live listing before you buy.

How do you get the 70550 Hex Wrench Key Set, 11 SAE Sizes for a cheaper price?

Three tactics work best: watch for holiday and seasonal sale events when hand tools discounts run deepest, compare the open box or renewed listing against new stock, and check whether KLEIN TOOLS is running a coupon or bundle. Adding the product to your Ravvy wishlist keeps it handy so you can revisit the listing when prices drop.

Is the 70550 Hex Wrench Key Set, 11 SAE Sizes in stock right now?

It was in stock at our last check. Availability on popular hand tools can change within hours, so the live listing is the source of truth.

Is the 70550 Hex Wrench Key Set, 11 SAE Sizes worth it?

Ravvy scores it 93.5 out of 100. The strongest argument for it is extended blades reach deeply recessed fasteners. The trade off to weigh is noticeably heavier than standard folding sets.

Who should buy the 70550 Hex Wrench Key Set, 11 SAE Sizes?

It fits hVAC technicians and industrial maintenance professionals If that does not describe your situation, compare it with the other options in Hand Tools before committing.

What are the key specs of the 70550 Hex Wrench Key Set, 11 SAE Sizes?

UPC: 363921746656 363921746649 359741319705 359741319699 359741319712 092644332845 363921746663. ASIN: B07SR11TC4. GTIN: 363921746656 363921746649 359741319705 359741319699 359741319712 092644332845 363921746663. Brand: KLEIN TOOLS.

What are good alternatives to the 70550 Hex Wrench Key Set, 11 SAE Sizes?

Compare it against the other scored picks in Hand Tools on Ravvy. We rank every option in that group by the same criteria, so you can see which model wins on value, quality, and owner sentiment before you decide.

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