The handle is the part held by the user and is contoured for a firm grip and improved control.
Push pin barrel
The barrel of a push pin holds the spring that allows the plunger to move back and forth when pressure is applied to the handle. This is why the push pin is referred to as “spring-loaded.”The barrel also has enough space for the plunger to travel back and forth. Sometimes, manufacturers stamp their name and/or the name of the tool onto the barrel of the push pin.
Internal spring inside a push pin
There is a spring inside the push pin that allows the plunger to easily move back and forth.
Push pin plunger
The plunger of a push pin is also known as the shaft or sliding barrel. The plunger holds the pin ready for use and moves in and out of the barrel when it is held against a surface and downward pressure is exerted on the handle.
Brass push pins have an internal magnet that holds the pin ready for placing.
Push pin ferrule
There are vintage push pins available that have an extra part to them, known as the ferrule, which is situated between the handle and barrel. A ferrule is a short metal sleeve for strengthening a tool handle at the end.
