鍵開 かぎあ道具 どうぐではありませんでした
kagiake dōgudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 鍵開け道具

1. Was not a key-opening tool.; Was not a key-opening device.

Past/Perfective
Negative
Polite
Formal Register