六ろっ角かくレンチ

noun

hex wrench; Allen key

A tool used to drive bolts and screws with a hexagonal socket. Often used in furniture assembly and bicycle repair.

See also: 六角穴付きボルト

• この家か具ぐを組くみ立たてるには六ろっ角かくレンチが必ひつ要ようです。

  You need a hex wrench to assemble this furniture.