Wirefy heat shrink male/female spade connectors were designed to create professional and highly durable electrical connections in seconds. When heat is applied, the insulation shrinks down, and heat activated adhesive comes out. This creates a seal that keeps out water, salt, and other elements. The spade part on these connectors is completely covered with insulation, leaving no metal exposed when mated.<br /><br /> These spade connectors can be used in marine, automotive, industrial, and home electrical projects. Terminals slide together and pull apart easily, so they are convenient for applications that require frequent connections. Female spade connectors are exceptionally useful for bus bar and fuse box installations.<br /><br /> Our heat shrink spade terminals have a width of 1/4" (0.250"). We recommend using a crimping tool for heat shrink connectors (not included) to ensure proper crimps.