When servicing Mares MR12 series first stage regulator, it is not the easiest job to install the circlip used  to retain the filter inside the first stage body as the spring tends to always push it out.

This tool will assist the technician installing the circlip by providing a "guide" for the parts to sit inside the guide bushing while using circlip pliers to gently push the circlip into its place.

Definitely a real time saver!

Circlip pliers are sold separately.

Regulator, parts and additional tools are not included.