Materials Durable construction provides longlasting durability and reliability. The threading aid is built to withstand heavy use and is designed for dependable performance. Secure grip Sawtooth antislip design securely holds the bottom box, providing stability and preventing slipping when pulling the wire. Its firm grip supports efficient and safe operation. Strong spring strength spring enables you to pull the wire firmly without slippage. The robust spring ensures reliable and efficient performance, making the threading process easier. Wide compatibility Specifically designed for 86/118 bottom boxes, this single pulley threading aid is compatible with various electrical setups. It offers versatility and convenience for different projects. Use scenarios Installing or updating wiring in electrical panels or wall cavities that use 86 or 118 bottom boxes. The threading aid guides and pulls wires through openings with reduced effort. Renovation or retrofit work in electrical cabinets or enclosures, helping route cables through tight spaces with steady control and minimal movement. General electrical installations in residential or light commercial settings, where reliable threading through bottom boxes improves efficiency and safety.