ferrule

 
Pronunciation: /ˈfɛruːl, ˈfɛr(ə)l/

noun

  • a ring or cap, typically a metal one, which strengthens the end of a handle, stick, or tube and prevents it from splitting or wearing.
  • a metal band strengthening or forming a joint.

Origin:

early 17th century: alteration (probably by association with Latin ferrum 'iron') of obsolete verrel, from Old French virelle, from Latin viriola, diminutive of viriae 'bracelets'