Friction hinges are mechanical devices that allow two parts to pivot relative to each other while providing resistance to movement. They are commonly used in applications like laptop screens and vehicle doors, where controlled motion is essential. The design typically includes a series of interlocking components that create friction, enabling the hinge to hold its position at various angles. These hinges can be adjusted to provide different levels of resistance, making them versatile for various uses. They are often made from durable materials like stainless steel or plastic, ensuring longevity and reliability in everyday applications.