Jisho

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ろっかくぼう 六角棒
Noun
1. hex key; hexagonal wrench key; Allen key (TM); Allen wrench (TM)
Wikipedia definition
2. Hex keyA hex key, Allen key, or Allen wrench (also known by various other synonyms) is a tool of hexagonal cross-section used to drive bolts and screws that have a hexagonal socket in the head (internal-wrenching hexagon drive). The Allen® name is a registered trademark, originated by the Allen Manufacturing Company of Hartford, Connecticut circa 1910, and currently owned by Apex Tool Group, LLC. Its genericized use is discouraged by this company.
Read “Hex key” on English Wikipedia
Read “六角棒スパナ” on Japanese Wikipedia
Read “Hex key” on DBpedia

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