lock-opening; lock-picking
Refers to the act or skill of opening a lock, often without a key. Can be used in both neutral and criminal contexts.
彼は鍵開けの技術に長けている。
He is skilled in the art of lock-picking.
鍵開け
Just possessing lock-picking tools can get you arrested.
lock pick; lock-opening tools
Compound of 鍵 (kagi, 'key') and 開け (ake, the noun form of 開ける, 'to open').