Where the sport of fencing all began...
The fence is a tile that is present on all prisons and can be cut with a File or any form of cutters (Flimsy Cutters, Lightweight Cutters, Sturdy Cutters).
You will be sent to solitary if the guards notice you cutting a fence; to avoid this, you can use a Fake Fence in place of the removed one.
Electric Fence[ | ]
The electric fence, however, features a blue color and is buried partially underground, obstructing tunnels. It is noticeably thicker than the normal fence, and upon attempting to cut through it, it shocks you and inflicts 10 damage, provided the Generator on the map is running.