Description:Material: Made of galvanized carbon steel, sturdy and durable, with strong load-bearing capacity. The surface is galvanized to make the product beautiful and have a longer service life.Spring Design: Toggle bolts feature spring-action wings designed to deploy behind the substrate after installation for a secure hold in hollow wall applications.Easy to Install: Drill a suitable hole according to the selected bolt size, insert the bolt into the hole, then loosen the toggle plug and pull inward, the expansion wings will automatically expand behind the hollow base material. Packaged in a storage box, each storage compartment maintains one size for your convenience.