This is a replacement knob for a washing machine Indesit WT62T. The button broke after two weeks we have purchased, it's time to let the damn plier that we used to turn the mechanism.
Hope it will help someone.
1) Print the two pieces and glue it.
2) Insert the red piece on the bottom.
3) Push strongly the knob in the hole.
4) Earn a lot of WAF point :)