Industrial quality HAZET 5-IN-1 quick coupling socket made in Germany. Fits most of the interface ends used in our region (male). Accordingly, we recommend using it in production and workshops. when using compressed air tools from many different manufacturers. Fits the standards common in the countries Germany. Austria. Slovenia. Hungary. China. India. Portugal. Poland. Romania. Turkey. Belgium. France. Netherlands. Switzerland. Italy. Spain. Arab countries and types EU. USA. Aro/Orion. Milton A-Style. Lincoln. US Automotive Lubrication System interfaces and many other less common interface types. The interface is made of nickel-plated stainless steel. Internal thread 3/8" (16.41 mm). total length 54.5 mm.