TIL why zippers have YKK on them. The YKK stands for Yoshida Kogyo Kabushikikaaisha. This company makes 90% of all zippers. They not only make zippers, they also make the machine to make zippers. They have over 206 factories in 52 countries. The largest in Georgia makes 7 million zippers a day!
by u/ddolson in todayilearned