The Uni-ball Jetstream (top ... Unlike a traditional retractable pen, which typically has a clicker on the top of the writing instrument, the FriXion pen’s clicker is the sliding clip that ...

[u407]’s 3D printed Signspinner was created as a clean/dirty indicator for a dishwasher, and at its heart is a mechanism that works a lot like that of a retractable ballpoint pen. Every click of ...