[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 ...

You've disassembled and reassembled retractable pens dozens of times. Who hasn't? But do you actually, really know how they work? Yes there's a spring and then the button also a weird tube thing ...

[Bill Hammack], aka the [EngineerGuy] is at it again, this time explaining how retractable ballpoint pens work. In this excellent video, he describes the simple (but remarkably sophisticated ...

Although the Pilot FriXion Clicker Erasable Retractable Gel Pen is not an official pick, it’s listed as the best option for anyone who’s too nervous to commit to writing in pen. I bought a ...

LiteW8 Zebra F-701 Pen Review by TheUrbanPrepper Posted: July 4, 2024 | Last updated: July 4, 2024 This is a review of my current EDC pen: Zebra F-701 Stainless Steel Ballpoint Retractable Pen ...