© Mio Tsugawa
This is a work that a part of Regular knot was separated into two.
Two joining methods are used to assemble.
One is to join parts together into one part.
The other is put parts together into the whole, and it's Rosette joint.
Yubikiri is pinky swear which is a Japanese custom.
It is to make a pledge or confirm a promise by linking little fingers with somebody.