Square D ZBG421E

Key, Harmony XB4, emergency stop push button, key 421E, set of 2 keys

This Harmony ZB, replacement keys (key no.421E) come in a set of 2 keys. This keys set consist of 2 replacement keys to provide a spare option for lock unit that allows a secure manner for authorized staff to operate your machines. It is compatible with standard latching mushroom head push buttons and selector switches units.