E-Frame Breaker are Lighting Panelboard Circuit breakers that are proven effective and reliable which provide a wide variety or robust features that are use specifically in Square D NF Panelboards. This range of breaker is ideally designed to offer superior overload and short circuit protection. All E-Frame breakers have a thermal-magnetic trip unit as well as signal indicator that will indicate when a trip has occur. Mounting bolts are used to hold these breakers in place. This product is a padlock attachment and is used for lock off only.