Smart key chain.This is a compact and ultra-customized key solution.This product contains no metal noise and is used to organize and store key rings.
In addition, this product is not limited to keys. As long as users like it, they can integrate usb flash drive and RFID chip together.
Inner column diameter is 4mm. Please make sure your keyhole inner diameter is larger than 4mm.
The standard inner column is about 11mm high (can hold 4-5 ordinary keys). If you have a special key, please measure it in advance.
The cross key can be installed (the thickness is equal to 3-4 ordinary keys). The vinyl head key can be installed, or it can be installed directly or electroplated to remove plastic supplement points.