What's the use of the golden key in Tina's fantasy?

Little Tina's dreamland golden key can be used to open the equipment treasure chest, so little Tina's dreamland golden key function is to open the box to get powerful equipment.

Little Tina's Dreamland is a series of derivative works published by 2K and Gearbox in No Man's Land, which is expected to be released in 2022. In addition to the main occupation, there are sub-industries to choose from in the game, but you need to unlock the sideline to use it. The second career choice of Little Tina's Dreamland needs to follow the principle of complementary main career to ensure the enhancement of combat effectiveness.