Piercing stretching rods and expanders.
The barbell is probably the most commonly used piercing jewelry. From nipple piercings to tongue piercings, bars can be used anywhere. That's why they are often used as jewelry for the first piercing.
In the past, bars were mainly made of stainless steel and titanium, but now they come in all sorts of different versions. They are shaped like a mini dumbbell, with both ends sitting on small screw threads and can be unscrewed. The ends can have very different shapes. Balls, pyramids and cubes are common, for example. They are often made or decorated from a different material than the bar. For example, balls made of stainless steel, silver or other materials can be screwed onto bars made of stainless steel or plastic.