Review on 🔧 Mastercool R134A Standard and JRA Valve Core Remover in Black by Greg Boulden

I just poured my jeep's air conditioning system only to find the only leak I left out was the high pressure fitting. I've had good luck with other Mastercool products so I decided to try #58531. Jeeps use stock valve cores, but this particular kit was available from Warehouse Specials, so I decided to save a few bucks. ;) The tool came without instructions, but was extremely easy to understand and use. The job actually took two minutes, and the tool lasted long enough to run to the auto parts store and get a replacement halfway through. Very happy with this tool, at least as far as standard kernels are concerned. Maybe one day I'll have a reason to try JRA kernels.