Install, extend, or rewire a circuit without hunting down new wire ferrules. These assortments include ferrules for most small and medium wire gauges.

Ferrules turn flexible, stranded wires into one rigid, straight wire that slides into spring-clamp and lever-clamp terminal blocks. When attaching your wire, use a wire ferrule crimping tool to avoid a damaged barrel and loose connection.

The heat-shrink plastic protects your wire from cuts and debris to prevent short circuits, while the pin inserts snugly into the tiny opening of your terminal block or other connection point for a solid hold. In addition to a protective seal, the heat shrink distributes strain when the wire is tugged or under tension for long periods. Use a crimping tool to squeeze the wire evenly into the barrel, where it touches the pin to establish conductivity. Then apply heat to seal the plastic onto the wire from all sides.