Review on NQN Valve Core Remover Installer Tool: Dual Size SAE 1/4 & 5/16, 25 PCS Valve Cores, Teflon Seal, 10 PCS Brass Nuts - HVAC R22 R134A R12 R407 R410 R404 R32 R600 A/C Compatible by Steve Wanogho

I had high hopes for this product, but as a result of my tests, I determined that it was not effective in removing NQN. The only positive aspect was that it was compatible with Teflon. Unfortunately, this is not enough to justify its price tag. The cons heavily outweigh the one pro, and I do not recommend this product for anyone in the Automotive Tools & Equipment industry.