A fencing pin is a pole that is used to fix a temporary fence in place.
It is also known as a barrier pin, or a road pin, although generally this second one does not have a lamp hook.
A fencing pin has a hook at the top called a lamp hook because you can hang a lamp from it, and a sharp tip at the other end, which is pushed into the ground.
The fence should be for temporary or light use only, due to the ease with which the pins can be knocked over or accidentally pulled from the ground.
Fencing pins are usually made from steel.
Some models have a ribbed surface. This provides greater holding power when the fencing pin is placed in the ground.