Smart keychain. This is a compact and highly customized switch solution. This product is metal noiseless and is used to organize and store key chains.

Also, this product is not limited to keys. Users can integrate the USB flash drive and RFID chip as long as they wish.

The inner column diameter is 4 mm. Please make sure your keyhole inner diameter is greater than 4mm.

The standard inner column is about 11mm high (can hold 4-5 ordinary keys). If you have private key, please measure in advance.

Cross key can be installed (thickness is equal to 3-4 ordinary keys). The vinyl head wrench can be inserted or directly inserted or electroplated to remove plastic reinforcement points.