Review on MASTERCOOL 82934 Side Coupler Blue by Cre Soto

This is the same low side fitting that comes with the Matco Professional A/C Service Kit because Mastercool makes the tooling for Matco. The connector uses 6 steel balls to connect to the low pressure connector (those cheap single hose AC charging kits use 4 plastic balls resulting in poor sealing and leakage). I chose JB Tool as I have bought several items from them over the last 2 years and they sell great, they have never had a single problem.