Metal material, no rust.
Strong metal clamp paper is firm and not loose.
Advantages: Spring-tight binder clip keeps files bound together preventing papers from slipping or pulling out, tempered steel construction provides extra strong hold. Holds papers together without leaving the mark of a staple.
Applications: Paper clip holder fit for office, home using, school using, especially for students, teachers to bind their documents, handles can fold up for handing or can be removed for binding.