The 100 PK Arlington (4402) 1" Snap-In Plastic Bushing is designed for use in knockouts in electrical boxes, providing protection for wires passing through the holes. To use, simply align the bushing with the knockout hole and snap it into place, ensuring a secure fit without the need for tools. The bushing helps prevent wire insulation from being damaged by sharp edges on the knockout, reducing the risk of electrical shorts. With a 75°C temperature rating, it is suitable for standard electrical installations in residential, commercial, and industrial settings. The plastic material ensures durability, making it a reliable and cost-effective solution for protecting electrical wiring.