Matthew Chalker, AKA Chalker7, is a California-based “informal educator, curriculum content specialist and digital fabrication expert.” Recently he spent sixty hours crafting a custom mechanical iris aperture engagement ring box to surprise his photographer girlfriend. She said “yes!”


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Chalker made the design based on the Instructables plan below, but wrote he would consider crafting another. “I would be happy to make and sell another, but there is a significant time and material investment however. To complete a full box we’d be looking at $2000-$3000 dollars. If you’re interested, send me your contact information and we can talk details!”

More info: matthewchalker.com | Instagram | Twitter | Iconoquare | Instructables (h/t: chalker7)

“I made an engagement ring box for my photographer girlfriend”

“It opens and closes like the aperture on a camera”

“A whole lot of hours went into this, but I’m pleased with the results”

She said “yes!”