Scubapro DIN retaining knob O-ring installation bullet tool
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.
Universal HP and LP O-ring installation bullet toolset (2 pcs)
Regulator hoses also need new O-rings during service but due to sharp threats, many of these O-rings get damaged at the installation process. Using this tool the O-rings stay in perfect shape, just place the tool over the hose and slide the O-ring in place.