Mersen DFC dead-front fuse covers snap on to individual fuses installed in fuse blocks, covering exposed live clips and terminals and reducing accidental contact by personnel. They are sized to fit class G, H, J, K, R, CC or midget fuses for increased safety and optional open-fuse indication. All DFC dead-front covers are reusable when a fuse is replaced - simply detach from the open fuse and re-attach to the new replacement fuse. On indicator models an orange indicator light will illuminate to indicate an open fuse