Used to insert O-ring into the main body of
a Scubapro MK10 first stage.
With this tools the job is done in a matter of seconds.
Place 2 of the parts of this tool set on the top and
bottom of the first stage body and push the O-ring
into its place with the small rod of the tool set.
DIN retaining knobs have big and sharp threats and putting an O-ring over these threats most of the time damages the O-ring.By using this small bullet the job is done quick while O-ring is still in perfect condition.