A simple, common tool used to temporarily hold a few sheets of paper together without tearing them.
 
These paper clips are made from a single piece of bent metal. 
 
The silver wires variant are galvanized to prevent rust and provide a shiny, corrosion-resistant finish.
 
The plastic-coated versions, available in many colors, are popular and can offer better grip and protection for delicate paper.
 
The iconic design is the "Gem" type, characterized by its simple, oblong shape with one and a half inner and outer loops.
This design is celebrated for its efficiency and practicality, as it uses torsion and elasticity of the wire, along with friction, to grip the paper securely.
 
The design allows the clip to be easily inserted and removed without damaging the paper. The rounded corners prevent snagging, and the inherent springiness of the metal ensures a firm hold.
 
Common uses:
 
While designed for fasting papers, paper clips are also known for their wide range of alternative uses.
 
Their slim profile makes them convenient for marking a page in  a book or planner.
 
The straightened wire can be used to press small, recessed "reset" buttons on electronic devices like routers or CD-ROM drives.
 
They can be attached to a desk edge to thread and organize charging cords and other cables.
 
Makeshift Tools - They can be bent into a temporary zipper pull, a micro-cleaning tool for small crevices, or even a basic lock-picking device (for non-illicit purposes like opening an old trunk)