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

OMG talking about a dangerous tool. I figured a more expensive tool that looked solid would do the job and be safe, but that's not the case. Quality control has obviously slowed this down. I connected to the high side and followed the directions as instructed. When I turned the stem knob and lock nut counter clockwise and pulled the stem everything was fine until I tried to close the valve knob and the whole part of the stem came off like a ball. The stem end stayed in and I couldn't close the valve. All coolant lost. Pooh. do not buy this product. I also inspected the other shafts and 1 of the 4 others was also defective with the pin holding the end being too small to hold the end. Buyer Warning.