ferrules

A ferrule is a ring, cap, or band, typically made of metal, that is fitted around the end of a component to reinforce, join, or seal it. The term is used across crafts and engineering to prevent splitting, provide a connection point, or secure an assembly. Ferrules vary in size, shape, and mounting method to suit the specific application.

In carpentry and toolmaking, tool ferrules are the metal bands at the ends of wooden handles on axes, hammers, chisels, and brooms. They stabilize the wood, resist impact, and help prevent the handle from swelling or cracking. In plumbing and hose fittings, a ferrule is a crimped or clamped ring that seals or secures the end of a pipe, hose, or flexible tubing to a fitting or connector.

In wire and rope work, ferrules are small metal caps that crimp onto the end of stranded conductor or wire rope to prevent fraying and provide a solid termination. In fishing and outdoor gear, ferrules join the sections of multi-piece fishing rods, often using a screw, cap, or compression mechanism. In furniture, decorative and functional ferrules reinforce legs or posts and can serve as a design feature.

Materials commonly used include steel, stainless steel, brass, aluminum, and nickel-silver. Proper selection and installation depend on load, environment, and compatibility with the joined components.