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Availability:
In Stock.
Arrives
Oct 22 – Oct 23
Features
- THE ORIGINAL MASTERCOOL HYDRAULIC FLARING TOOL Mastercool pioneered and patented the first hydraulic flaring tool, setting the industry standard for precision, reliability, and durability. Trusted by auto repair shops, fleet mechanics, and professional technicians worldwide.
- NOW WITH GM TRANSMISSION COOLING LINE DIES & ADAPTERS Includes new GM transmission cooling line dies and adapters, making it the ultimate hydraulic flaring tool for GM fuel & transmission lines, brake lines, and hydraulic tubing.
- CREATES 7 FLARE TYPES FOR VERSATILE APPLICATIONS Works with 3/16", 1/4", 5/16", 3/8", and 1/2" tubing to create 45 double & single flares, push connect flares, GM fuel line flares, ISO bubble flares, GM transmission cooling line flares, brake line flares, and hydraulic line flares.
- HYDRAULIC POWER FOR EFFORTLESS, CONSISTENT FLARES The hydraulic ram system eliminates manual strain, making flaring faster, easier, and more precise than traditional flare tools. The die set stabilizing arm and magnetic adapter holder keep components secure for repeatable, leak-free results.
- PRECISION-FORMED HIGH-STRENGTH DIES The included high-strength steel dies are precision-formed to create accurate, consistent flares while minimizing metal fatigue, ensuring reliable, long-lasting connections.
- MAGNETIC ADAPTER HOLDER FOR QUICK ACCESS The built-in magnetic adapter holder keeps dies and components securely in place, preventing loss and allowing for quick and easy changes between flare types.
- HEAVY-DUTY CONSTRUCTION FOR PROFESSIONAL USE Built with a reinforced, high-strength steel body, this tool is designed for professional mechanics, ensuring durability and precision in high-pressure tubing applications.
- MINI TUBE CUTTER INCLUDED Comes with the Mastercool 70027 Mini Tube Cutter (for 1/8" to 5/8" O.D. tubing), ensuring clean, smooth tube ends for professional-grade flaring.
- CUSTOM-MOLDED STORAGE CASE The custom case keeps all dies, adapters, and tools protected and organized, allowing for easy transport and secure storage.
- IDEAL FOR AUTOMOTIVE, HYDRAULIC, AND INDUSTRIAL APPLICATIONS Specifically designed for brake lines, fuel lines, GM transmission cooling lines, and hydraulic tubing in automotive repair, fleet maintenance, and industrial applications.
Description
This kit fabricates: Push Connect 1/4, 5/16 and 3/8”, GM Fuel Line Flare, Brake Lines and Transmission 5/16 and 3/8”, 45˚ Flare/Double Flare 3/16, 1/4, 5/16, 3/8 and 1/2”, Metric Bubble Flare 4.75, 6, 8, and 10 mm, GM Transmission Cooling Line 3/8 and 1/2”. Also included in the plastic box is Mastercool's Mini Tube Cutter for 1/8" to 5/8" (3-16 mm) O.D. tubing (Patent # 6324884) Set Includes: Fabricate 1/4, 5/16" and 3/8" push connect flares. Fabricate 5/16 and 3/8" GM fuel line, brake lines and transmission flares. Fabricate 3/16", 1/4", 5/16", 3/8" and 1/2" 45˚ and double flares Fabricate 4.75 mm, 6 mm, 8 mm, 10 mm metric bubble flares. Fabricate 3/8" and 1/2" GM transmission cooling line flares.
Manufacturer: Mastercool
Brand: Mastercool
Model: 72485-PRC Universal Hydraulic Flaring Tool Set (Includes 3/8" and 1/2" Transmission Cooling Line Die and Adapter Sets)
Item Weight: 12 pounds
Product Dimensions: 14 x 12 x 4 inches
Item model number: 72485-PRC
Exterior: Structural body is Metal
Manufacturer Part Number: 72485-PRC
Date First Available: October 4, 2017
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Oct 22 – Oct 23
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
I bought this in preparation for doing some brake work on several different vehicles where I would be making my own lines. Being able to make fuel line and transmission line connections is a bonus too. So far it has performed flawlessly on everything I have used it on. Inverted double flares come out perfect with no worries about leaks. Granted I have not used every fitting and adapter it has yet, but I did play around with some of the ones that I have not had a call to use just to verify it would indeed make the proper ends without any trouble. Being a mechanic since the late 1980s, I have seen all sorts of shade tree hatchet jobs on transmission, power steering, and even brake lines over the years. Most of the time it is because they did not have the proper tools for the job and/or did not know any better. Compression fittings are fine for non-critical, low pressure use but I would never trust such a fitting in a brake system that has to work in emergency circumstances with pressures over 1000psi. I have seen many of these develop leaks over time and have heard of them blowing apart. I have even seen a brake butcher job where someone tried to use just a single 45 degree flare to join the lines. Thankfully they could not get it seal off and brought it to me to fix it properly. Before this tool, I would just buy lines in predetermined lengths as close to what was needed as possible and bend them to shape and try to make sure any excess was safely out of the way somewhere or buy line with the correct bends already in place. Now, thanks to this tool, I am no longer confined to those two choices as I can make my own lines the exact length I need without worrying about the ends. I have seen numerous PS & transmission lines patched with rubber hose over the years that often leak later because people just slide the hose right up on the smooth metal line. Eventually the hose slides off because there is no flare for a clamp to hold against. This tool solves that problem too. Just use the fuel line fitting dies but do not crimp them all the way. About 3 to 6 pumps (depending on the line) after all the slack is out of the tool will leave a nice rounded bubble flare in the line that doesn't have any sharp edges so a hose can easily be pushed over it but have enough flare to keep the hose clamps from allowing the hose to slide off over time. It may take a bit of experimenting to get the proper size bubble in the line. I have included a picture of such a bubble & the fuel line flare that results if you go until the tool stops. The included tubing cutter is the small type intended for close quarters and works well enough. I would advise buying a dedicated tool for reaming/deburring your lines after you cut them. The case is also a decent case with an actual hinge & decent clasps to hold it closed. Not just a thin plastic strip hinge that always cracks after a few years leaving you with a box that no longer stays closed & loses components. If you regularly work on automobile hydraulic or fuel lines I would say buy this tool. The only thing that would make it better is if you could buy it with the 37 degree dies for AN fittings already included with these instead of having to buy them separate.
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Reviewed in the United States on February 8, 2022 by James E. Hawkins
Instructions are kinda poopy. YouTube University has videos. Tool is super easy to use (with good instructions). Made very nice bubble flare on second try. Make sure you compress the tool adequate enough with the bubble dye. Then finish up with the cone flare. Waaaay easier and higher quality flare kit than the old style. Will be easier and quicker to use on a vehicle too. Get one!
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Reviewed in the United States on January 13, 2026 by Wayne
Needed to make one simple brake line for my trailer. This is definitely overkill but do it once and do it right. I have some GM vehicles so having the ability to work on those lines in the future seemed like a good idea. Hopefully never use it.
Reviewed in the United States on June 30, 2026 by aschnell
Makes great flares, but the dies will not stand up to stainless steel. I got maybe 12-15 good flares before the ridges of the dies gave out and I had to replace the 4.75mm dies. Flares Nicopp great, next to no wear. Steel lines flare great but wear out the dies less than stainless. It’s not specifically advertised as a stainless capable tool is why I give 5 stars.
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Reviewed in the United States on August 15, 2026 by Shawn Brazil
I've fought the cheap double flare tools for years. Working on a vehicle where I'm replacing all the brake lines I figured I would spend the extra money for this tool based on previous reviews. This tool makes beautiful double flares as where with my old setup I would have wasted alot of time and most likely would have had to redo many of them. With this tool it's easy, fast and it produces flawless double flares. I wish I would have bought it alot sooner.
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Reviewed in the United States on January 4, 2025 by Jack of All Master of None
It makes beautiful flares easilly. I was so happy to get a perfect flare on 5/16" tube the first time after many failures with the auto parts store kit that i had absolutely no buyers remorse after spending all that money. It's that good. Getting the dies in and the tubing aligned takes a little practice but is easy once you get the hang of it. It's almost like the grip you use on a guitar neck. To get a full rating from me the kit needs a few things. First, a better tubing cutter. Fortunately the one i bought a while ago at the hardware store fit in the case. Second, a deburring tool. I used the one from my P.O.S. flaring tool kit I got at the auto parts store. See the picture for the part number. Third, a small jewlers file to get the outside of the tube cleaned up. And finally, a 1/2" ratchet wrench. I had one from Harbor Freight and it works perfectly. All that actually fits in the case, too. To do 3/8" tube, you need to grease up the threads on the die clamp screw real well, remove the t-handle, and use the 1/2" ratchet wrench. After that, it's no different effort wise from the smaller stuff, and the tube was not crushed or damaged. I did not have any 1/2" tube to try. The flares in the pictures are all 3/8" tube. TLDR: I am pleased with the performance of this tool. The kit needs help for tube prep tools and a 1/2" wrench, though.
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Reviewed in the United States on May 13, 2020 by Kevin C.
Complete set for just about any vehicle line you may need to make. Works for my 2007 Silverado HD
Reviewed in the United States on February 15, 2026 by Mike S
This is an amazing flaring tool. A bit expensive but completely worth it. This thing effortlessly double flared stainless steel.
Reviewed in the United States on June 4, 2026 by Tommy DeGrange