Add these 37-degree Flare Dies to our Pro Brake Tubing Flaring Tool so you can do even more. Put 37-degree flares on 3/16″, 1/4″, 5/16″ and 3/8″ tubing7 punch sizes, turret-style4 die blocks If you have our 25304 Professional Brake Tubing Flaring Tool, you can already easily produce 45-degree flares. But add this flare die kit and you’ll also be able to create the 37-degree flares used in many custom, hydraulic and military applications where AN- or JIC-type fittings are used. It’s a “must have” accessory for custom plumbing and line-fitting on your street rod or hot rod.