From Manufacturer:

Fits them all, big to small – expands to fit 4 to 18 inch pendant controls.

Prevent accidental access with rigid sides that protect buttons

Store it away – collapsible design allows it to flatten so you can easily store it when not in use

Keep the cover secured on the pendant control by applying up to four padlocks

Have a mechanical hoist or overhead crane that’s not in use? Keep it that way by controlling access to the buttons with the Brady Pendant Control Safety Cover.