JOBOX lock-down hopper chest includes two reusable mounting brackets. An internal mechanism locks the chest on the brackets. Turn the locking mechanism to release the chest from the mounting brackets to move or relocate it. Model 814000 and 815000 JOBOX steel portable utility chests will also fit inmost truck beds. They have reinforced lids and cam-style locks for improved security and locking arms to hold the lid open for easier access.