[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) ...

[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 the ...

If you grew up enjoying Stephen Biesty’s cross-sections like me, you’ll appreciate this brilliant project from Google engineer Bryan Macomber. The website brilliantly breaks down mechanical objects, ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Elissa Sanci Elissa Sanci is a senior writer who has reported on label makers, ...

If you’ve ever wrestled with or tripped over a tangled garden hose, you might want to consider investing in a retractable hose reel. Designed for convenience and safety, they ta ...