Designed & manufactured in Sheffield by PCL, the Vertex Coupling with a R 1/4 male thread features a double action mechanism, this means the user will need to pull the sleeve back to insert the adaptor then push the sleeve to lock the adaptor in place & vice versa, this prevents accidental disconnection, making the Vertex Coupling ideal for garage & tyre shop environments, especially where operatives are using air tools or handheld tyre inflators. For use with PCL standard adaptors (sold separately).