The Arlington EMT350S 3 1/2" Insulated EMT Split Bushing is used to protect electrical conduit from damage caused by sharp edges where the conduit enters a box or other electrical device. To use, simply slide the split bushing over the end of the EMT conduit before inserting it into the knockout opening of the box or device. The insulation on the bushing helps to prevent abrasion and ensures a secure fit between the conduit and the box. The split design makes installation easier, as it can be snapped into place without the need for additional tools or hardware. This bushing is ideal for maintaining the integrity of the wiring system and providing extra protection in both residential and industrial electrical installations.