Review on Universal Black A/C Valve Core Remover/Installer by MASTERCOOL - Model 58490 by Peter Hallett

I use this kit to replace Schrader valves on my AC work vehicles (f150s, rangers and tacomas). hand, and I gave it 3 stars instead of 5 because while the largest fitting unscrews the valve core, the Schrader valve is just too big to fit cleanly through the ball valve. I bought this kit on purpose as it had the largest valve I could find but it is about 1mm smaller, the shredder unscrews nicely but has trouble going through the ball valve so I changed the valve after the The Schrader valve has to be unscrewed and knocked out under pressure. . It looks like it caught a bit on the teflon seal on the ball valve, so I'm hoping over time it will wear out a bit and slip out. I can install a new valve. The underside and other minor Schrader scans can easily be swapped out, the o-rings and seals on this one are first class and the finish and quality of the hardware is great.