Stud welding is a welding technique in which a metal bolt is attached onto a substrate using a gun. Stud welding is primarily used to attach small metal studs or bolts or other small items, such as bushes with internal threading, onto a sheet. The stud to be welded is loaded into a gun and when the machine is switched on, an electric arc is briefly formed between the stud and the material, which makes the surface of the stud and workpiece viscous. Immediately after this, the stud is forcibly shot onto the workpiece, typically using a spring. To ensure that the discharge is produced in the middle of the stud and the bath is created at the right location, the stud is designed with a point on it.