A hairpin clip is a tiny metal clip that looks like a bent piece of wire in the shape of a "U" or a hairpin. The clip is used to hold things together or in place, whether it's hair or objects. Hairpin clips are commonly used in the automotive and manufacturing industries to fasten objects like hoses or wires. They are also used as retaining clips to keep parts from falling off, like on a car's brake system. So, just like how a hairpin keeps hair in place, the hairpin clip keeps objects in place too!