Sheaffer O-Ring Seater for Snorkel + Touchdown (Tool D19)

A double-sided tool that gets inserted into the front of the barrels of Snorkels (one end) or into the barrels of Touchdowns (the other end of the tool) to provide a stopping point, or a small, round platform to help you get the O-ring into the groove in the back of the pen. A variation of an old Sheaffer repairman's tool called a "COMPRESSION GASKET STOP". But this one is two sided, to accommodate two different pen models. It also comes with a metal tamper with an O-ring sized circular notch to help seat the O-ring from the top of the barrel once you get the O-ring in roughly the correct position.

We also make this tool to fit PFMs, tool S24. 
Our D12 pick is very helpful in getting out the old O-ring.