Grub screws, also known as set screws, are versatile fasteners designed to secure components in place without the need for a traditional nut. They are typically characterized by their cylindrical shape and internal hexagonal or slotted drive, which allows them to be tightened using an Allen wrench or screwdriver. Grub screws are often used to fix gears, pulleys, or other components onto shafts, where they provide a secure hold by engaging with the shaft's surface through a pointed or flat tip. Made from materials such as steel, stainless steel, or alloy, grub screws offer strong, reliable fastening with minimal protrusion. Their compact design and effective locking mechanism make them ideal for applications in machinery, automotive, and precision engineering, where space constraints and secure fastening are critical.