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🔩 Elevate your flare game with pro-grade precision and durability!
The Mastercool 71098 Hydraulic 37° Flaring Tool Kit is a professional-grade adapter and die set designed for creating precise, leak-free 37° single and double flares on tubing sizes from 3/16” to 1/2”. Engineered for compatibility with Mastercool’s hydraulic flaring system, this hardened alloy steel kit meets SAE J514 and ISO 8434-2 standards, making it ideal for hydraulic, aerospace, automotive, and HVAC applications. Backed by U.S.-based support, it delivers durability and accuracy for demanding professional use.





| ASIN | B002YKNXKS |
| Best Sellers Rank | #114,262 in Automotive ( See Top 100 in Automotive ) #49 in Brake Repair Brake Flaring Tools |
| Brand | Mastercool |
| Brand Name | Mastercool |
| Color | Silver |
| Connector Type | Flare |
| Customer Reviews | 4.6 out of 5 stars 218 Reviews |
| Exterior Finish | Aluminum |
| Global Trade Identification Number | 00700376710984 |
| Included Components | 37˚ double flaring adapter and die sets for 3/16, 1/4, 5/16, 3/8, and 1/2” and cone |
| Item Dimensions | 12.75 x 3.75 x 3.25 inches |
| Item Type Name | 37 Degree Hydraulic Flaring Tool Adapter Set |
| Item Weight | 2 pounds |
| Item dimensions L x W x H | 12.75 x 3.75 x 3.25 inches |
| Manufacturer | Mastercool |
| Manufacturer Part Number | 71098 |
| Manufacturer Warranty Description | 1 year |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Model Number | 71098 |
| Number of Packs | 1 |
| Number of Pieces | 37 |
| Set Name | 37 Degree Hydraulic Flaring Tool Adapter Set |
| Size | 37 deg. Flaring & Double Flaring Adapter Set |
| Thread Size | 3/16", 1/4" |
| Thread Type | Metric Tapered |
| UPC | 700376710984 |
| Unit Count | 1 Count |
S**8
Very nice addition to the Mastercool 45 degree set
I have the Mastercool 45 degree set and started working with AN fittings. AN fittings are 37 degree not 45 degree. Was pleased to find that all I needed was a die set. I tried out the 5/16 and 3/8 dies and they work great.
J**S
Good Tool Well Made
Did not use this as of yet but if it is similar to the other Mastercool Flaring tools I expect a good easy flare>
A**O
Itemized dies parts# with details about kit
I bought this kit to add to my 45 degree kit so I can also do 37 degree flares but I noticed you only need square dies and the 37 degree cone the silver plunger for all the sizes is the same 45 degrees plunger die that comes in any 45 degree set The silver plungers are 45 degrees (as shown in picture) The cone is 37 degree And all the square dies are 37 degrees (as shown in picture) So if you already have a 45 degree set you only need the 37 degree cone and the 37 degree square dies for whatever size you plan to do. Picture with all part numbers This kit fits any hand hydraulic. The kit is priced decently Quick and easy to make 37 degree flares It functions as any 45° set, just for 37 degrees Fast and easy to use
J**E
NA
Fast shipping just as described
P**T
Great tools!
Great tools, I just wish there were slots provided in the case of the complete tool set , for these to be stored in. If not, then for the price there should have been a comparable blow-molded case for the extra dies. C'mon guys, a little common sense goes a long way here. Great tools, but you let us down on the storage aspects. Gotta protect my pricey tools! Got it?
K**X
Work great but don’t come with a nice storage solution
Worked great but they desperately need a blow molded case instead of these random loose little cardboard boxes that each individual piece comes in
N**E
Don't try any other Flaring tool if you want it done right and frustration free.
Ordered wrong set and returned this one. I did however purchase a larger complete kit that works great. Would recomend Mastercool tools to anyone. They were great about accepting my return and even gave me the information for the set I needed. This is the only Flaring kit I would suggest if you want the job done right. Don't waist your money on any other setup!
B**N
Makes Perfect 37 Degree JIC flares
Man, I use the heck out of these things! I bought them as an add on to complete my Mastercool flare kit. These things are great quality, never slip on the hard line and work on Aluminum, CuNi, steel, and even really hard Stainless steel. Prettiest flares you've ever seen! Just remember to put the nut and sleeve on first... and face the sleeve in the right direction too.. Lol...
A**R
Great tool
The actual tool was and worked as expected, it did a great job flaring hydraulic lines to connect to jic fittings. The only down side is that there is no case for all the pieces and there is no place to put them in the master set. So a case included would be a great asset
G**E
Amazing Amazon!
The Mastercool kit is an addition to my existing Mastercool tools - brilliant tools to give a perfect finished result. The exceptional bit is that Amazon Prime facilitated getting this kit from Texas to Melbourne, Australia in four days and at a VERY good price! Amazon Prime has opened up a trustworthy international buying avenue for me I did not know existed. Well done.
G**N
Slow shipping great tools.
Took awhile to get here but great tools from mastercool. I stripped the bubble (clamp) dies trying to do 3/8 stainless. It was .49 wall and way too thick. Should be able to handle .28 stainless. The does still work but leave marks on tubing now. Guess we’ll see how there warranty is.
A**R
Five Stars
Works well thank you.
R**.
good unit
excellent as expected from mastercool
Trustpilot
1 week ago
3 weeks ago