Air quick couplings are a big restriction for air. Tune up your air tools by cleaning up the couplings! T-Shirts USA https://teespring.com/focus_us T-Shirts Europe, Eurasia, Oceania: https://teespring.com/focus_eu Long term projects here: http://www.Patreon.com/AvE through the looking glass https://youtu.be/2cerHv5Ah3Y