option key gives flexibility to keys management.

To share keys smoothly with your friends or colleagues, for instance bike key.

to color code for similar looking keys.

Not to leave keys with USB stick connected to computer at the office.

a little bit of care for plactic IC badge.

also for plastic mini cards.

of course for traditional keys.

can be added as many as you need.

softer feel in your pocket.

available in 4 colors: choco / camel / red / navy