Review on 🔧 Mudder A/C Valve Core Remover Tool Kit with Dual Size SAE 1/4 & 5/16 Port, R410 R32 Brass Adapter, 20 Valve Cores and 10 Brass Nut HVAC Valve Core Removal Installer Kit by Jason Holt

I found that it doesn't work right away - the hole through the valve is too small for the extractor and cores to easily pass through. I rebored it and then it worked (the seals are in a separate part of the tool so it will still withstand both pressure up to 300 pounds and vacuum down to 200 microns even after the ball valve has popped a little was drilled out). The core is removed and in the end I used pliers to pinch the part of the handle that goes around the core so it holds better. Good for casual use/DIY, but pros should use something like Appian (which is twice the price).