The box trap is another old design that hasn’t changed much since its creation, much like the wire trap. The original design was made of wood (which you can still find), though the newer version is made of hard plastic.
The box trap uses a stiff wire at the bottom of the trap that is set off when the gopher climbs over it and hits the trip plate. The bottom wire lifts and traps the gopher, a quick and humane solution. These are best used when the gopher tunnel being targeted is too narrow for a wire trap.
The downside to using box traps is that it will require you to remove quite a bit more soil in to place them in comparison to the wire traps. To solve for this when working on a lawn, remove a few large pieces of sod above the main tunnel and place in a shaded area until you are done trapping.