Lock Box (5e Equipment)
From D&D Wiki
|Chest||1 cubic feet/30 pounds of gear|
A strongbox is a small metal chest with a lock, most commonly crafted from brass or iron. It comes provided with a key, and it takes a DC 15 Dexterity check to pick the lock with thieves' tools. For an extra 100 gp, the lock has a of DC 20; for an extra 1,000 gp the lock has a DC of 25.
Cost: 15 gp
Weight: 4 lb.