Allen wrench

US /ˈæl.ən ˌrentʃ/
UK /ˈæl.ən ˌrentʃ/
"Allen wrench" picture
1.

chiave a brugola, chiave esagonale

a type of wrench used to turn bolts and screws with hexagonal sockets, also known as a hex key

:
He used an Allen wrench to assemble the furniture.
Ha usato una chiave a brugola per montare i mobili.
Do you have a small Allen wrench for this screw?
Hai una piccola chiave a brugola per questa vite?