I did some research and bought some couplers from Sherwin Williams Automotive they are Prevost Couplers. They have all the profile but what I was looking for was the High Flow style for the HVLP spray gun and the high demand air tool. These couplers work great and do not leak and this on pictured is the safety coupler, all you have to do is push the coupler once for disconnection. They are a composite but they are a robust heavy duty product and paid more for it but its worth it. I found out that Matco handles this product also.