The common embroidery key ring is the 1#standard split ring. It is used in a wide range of applications and is usually about 3cm in diameter. The materials are made of stainless steel and the color is stainless steel. No matter how long it takes for daily life, it will not rust. And it's still bright and beautiful.

#2, #3, #4 are special key ring accessories. And the key price with it is slightly higher than the ordinary keychain. Whether it's accessories or technology is a lot more complicated.
Remove before flight is not just for binding keys. Many young people or travel enthusiasts like to put the keychain on the backpack and on the luggage. It gradually became an ornament. So doing promotional items is also a good choice.