We provide customers with 11 different colored key sleeves to enhance the functionality of the keys.

For example, the master key sleeve has a black key cap, while the sub-keys are not sleeved, making it easy to distinguish the master key in actual use.

Departments are assigned different colors: red keys with red padlocks for the electrical maintenance department, yellow keys with yellow padlocks for the machinist department, and blue keys with blue padlocks for the production department. This color-coded system allows for quick and clear identification of which department is performing maintenance or which keys belong to which department, facilitating management.