Allen wrench

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

内六角扳手, 六角扳手

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.
他用内六角扳手组装家具。
Do you have a small Allen wrench for this screw?
你有这个螺丝的小内六角扳手吗?