MANHOLE GUARD ONLY 42". All yellow metal and aluminum oriental manhole guard is a temporary barrier to block access to open manholes. It can also be placed to keep traffic and pedestrians away from underground facilities. It features two 42-inch safety chain clasps on the open side to prevent unwanted entry. Comes with three pieces of four-inch high kickplates on three sides. In addition, it also has three engineer grade reflective blades with orange and white stripes to indicate caution.