盲扣 / Blind fastener

It often happens that people do up the bottons wrongly. In the blind's world, everything is dark, how can the blind avoid the cases that they can't see and do up the bottons wrongly?

Blind fastener help you solve this little problem. According to the braille 1, 2, 3, 4... from top to bottom as labels attached tax clasp process with the thumb and forefinger phase contact part, the blind can realize convenient self care.