noun
lock pick; lock-opening tools
Refers to tools used to open locks without the original key, such as picks, tension wrenches, and similar devices.
彼は鍵開け道具を使ってドアを開けた。
He opened the door using lock-picking tools.
鍵開け道具の所持は法律で規制されている場合がある。
Possession of lock-picking tools may be regulated by law.
Compound of 鍵 (key), 開け (opening, from 開ける), and 道具 (tool).