Size 8, 18.54 mm inner diameter. Innovative five-band ring design by Bram Cohen.
Metal version <-- THIS
Nylon version

Watch the YouTube video of the nylon version.

Other puzzle rings designed by Bram:
Sixth Sense
Take Five
Cross Rings


IN: 1.02 w x 1.296 d x 2.009 h
CM: 2.59 w x 3.292 d x 5.102 h


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