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OTC 4503 Stinger Double Flaring Tool Kit

4.0 out of 5 stars 121 customer reviews
| 3 answered questions

Price: $34.83 & FREE Shipping on orders over $49. Details
Only 11 left in stock (more on the way).
Ships from and sold by Amazon.com.
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  • Designed for double or single flare in copper aluminum soft steel brake line and brass tubing
  • Chrome swivel is made of alloy steel and reduces friction
  • Forged yoke is made of heat-treated steel
  • Includes five adapters covering 3/16 inch through 1/2 inch and 4.8 mm through 12.7 mm
  • Housed in a blow-molded storage case
33 new from $22.81 1 refurbished from $30.95
$34.83 & FREE Shipping on orders over $49. Details Only 11 left in stock (more on the way). Ships from and sold by Amazon.com.

Frequently Bought Together

  • OTC 4503 Stinger Double Flaring Tool Kit
  • +
  • Ridgid 32975 1/8-Inch to 5/8-Inch Close Quarters Tubing Cutter
  • +
  • TEKTON 6519 Three-Size Tubing Bender
Total price: $57.83
Buy the selected items together

Product Information

Technical Details

Brand OTC
Item Weight 2.6 pounds
Product Dimensions 9.9 x 6.3 x 2.2 inches
Item model number 4503
Exterior Smooth
Manufacturer Part Number 4503
OEM Part Number 4503

Additional Information

ASIN B000L7QZ0Q
Customer Reviews
4.0 out of 5 stars 121 customer reviews

4.0 out of 5 stars
Best Sellers Rank #7,227 in Automotive (See top 100)
#1 in Automotive > Tools & Equipment > Brake Repair Tools > Brake Flaring Tools
Shipping Weight 2.5 pounds (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First Available July 7, 2004

Warranty & Support

Warranty, Parts:Parts
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Product Description

The OTC Stinger double flaring toll is designed for double or single flare in copper, aluminum, soft steel brake line, and brass tubing (to 45 degrees). The chrome swivel is made of alloy steel which reduces friction and the forged yoke is made of heat-treated steel for long life and durability. The kit comes with five adapters covering sizes from 3/16 inch through 1/2 inch and 4.8 millimeters through 12.7 millimeters and a blow-molded storage case.

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By Philip Russo on December 26, 2010
Verified Purchase
This is a well made, easy to use tool that produces great results. It's made by OTC so it is tough, and will last a lifetime if used properly. I bought a small reamer with a short handle on it, and it fit in the case like it was part of it just under the clamp bar.
If you properly cut, set and ream the tubing as well as use a few drops of oil on the dies and the point of the flaring tool it will work perfectly and for quite a long time.
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Verified Purchase
I have used flaring tools on plumbing, but never attempted a double flare. Needed this while replacing brake line on vehicle. This kit provided the proper size i needed and others as well. directions were straightforward and easy to understand and finished my brake replacement with ease.

I suggest this kit to anyone doing double flares.
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The tools works ok but if you are not careful the compression device will slip off the holding frame. It takes some practice to use correctly. I would advise doing some "dry runs" on pieces of scrap tubing before using it on something that would be inconvenient to replace. A fair value for the occassional user.
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Bottom-lie up front: If you are an occasional user of mild/light steels or metals, this kit is okay. If you are dealing with Stainless Steel tubing, this is NOT what you want.

I bought this tool to repair a blown-out brake line on my 14 year-old truck. I also purchased a spool of zinc-coated steel tubing and fittings to do the job. Anyhow, I was able to make decent flares with the mild-steel tubing. One problem though is that when you gronk the clamp down onto the tubing, the two halves of the clamp piece are not exactly lined up perfect, which can affect the accuracy of the flare. After completing the repair, I ordered SS replacement (pre-bent) lines for the whole truck. One of the lines simply would not feed through the little nooks and crannies in one piece so I decided I would cut it at a convenient spot, feed it through, then splice the ends together with my flaring tool. The flare tool did not work, and after removing the tubing from the clamp I realized that the SS tubing flattened all of the gnurling on the clamp such that it will no no longer hold even mild-steel tubing tightly to make flares. So now the clamp is trash, at least for 1/4' tubing. I will note that the box does say inside (very small print) that it is for mild/light metals, so it is pretty much my fault. Otherwise, this is a pretty decnt tool. It got me out of a jam, so I was pretty happy, just perturbed that it wasn't strong enough to do stainless.
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Verified Purchase
This tool worked great for the price. I used it to make about 12 flares so far.

Word of advice, because it took me a little while to figure this out. To make a double flare, you need to press it with the supplied die to form the bottom side of the flare, then back it off, and remove the die, and press it again, with just the conical end on the tool. Once I figured that out, it does a nice job.
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Verified Purchase
Contrary to advice I received, I found that chamfering the rim of the tube being flared is an absolute must. Without doing so, as you compress the flaring die, the tube simply gets squeezed down and out of the clamping device, ruining the neck of the tube. I found that to get a good, even, and consistent flare I had to chamfer the rim w/ a grinder. I used a dremel and a vise, but a bench grinder would've worked better.
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Verified Purchase
For the price, it's great. Sometimes you make duds, but mostly I was able to get it right (I changed all the lines on a RAM truck so I got a lot of practice). Did a few tests and some were crooked, eventually I learned how to make it perfect.

Moreover, halfway through the job i discovered that I also needed to make bubble flares.... and a quick youtube search showed that you can make decent bubble with this tool by using it upside down. No leaks so far.
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Verified Purchase
Nice product that's easy to use. Just make sure the line is tight before screwing down flaring tool and all your flares will look great. Read reviews on that so I did the first one and all the others perfectly. Great product for the price.
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