" Ha ha ha, " said Eleseus himself at that; but he went in to his mother, and got her to give him an old thimble, filed off the end, and made quite a fine ferrule.
A ferrule (a corruption of Latin viriola "small bracelet", under the influence of ferrum "iron") is any of a number of types of objects, generally used for fastening, joining, sealing or reinforcement. They are often narrow circular rings made from metal, or less commonly, plastic. Ferrules are also often referred to as eyelets or grommets within the manufacturing industry.