An emergency evacuation system includes one or more walkways that extend from a first multi-story building, at designated floor levels above the ground floor, to an adjacent multi-story building. The clamp includes a pair of downwardly extending nubs that engage a pair of notches in the cutting insert when the clamp is brought into pressing engagement with the insert, thereby securely clamping the cutting insert in the insert-receiving pocket of the tool holder. Moreover, a single lithographic masking layer is used for forming the pair of electrodes, which are electrically isolated.