QuickCable 350 Amp Quick SB Safety Boot (5 Pack) - First step to keeping terminals clean when equipment is disconnected. Safety boots are a Quick Cable innovation and unique product. Boots can be customized to fit exactly by cutting the opening to fit the cable being used. Protect SB connectors from impact damage, provide strain relief for the cables, help prevent accidental arcing, seal out acid, dirt, and moisture, and fit all major brands of connectors.