Ferrule

A ferrule is a circular clamp used to hold together and attach fibers, wires or posts.

Examples of ferrules:

• In a brush or quill ferrule binds the bristles or hair to the handle.
• The metal ring which is crimped to hold the eraser in place on pencils with an attached eraser.
• The metal ring which holds a chisel blade's tang to the handle.
• The metal cap put on the end of a bicycle's cable housing.
• In fiber optic terminations, glass or plastic fibers are bonded to precision ferrules and polished for spliting or connecting two fibers together.
• In restorative dentistry: margin of a cast crown that stabilizes root-canal treated teeth

See also: Ferrule, Bicycle, Bowden cable, Brush, Chisel, Clamp, Eraser, Fiber, Pencil, Quill