This is a case for the LCR-T9 electronic parts tester, a sibling of the more popular LCR-T4.
Tolerances are there, but will depend mostly on the particular size of your battery and or board.
Printed on a printer formerly known as Ender 3 V2 with Sunlu clear PETG (in my mind was a great idea, dind't turn so well).
The main case is printed upside-down (letters in front of the bed) and will need supports for the border by the board pads checker and lever.
The author hasn't provided the model origin yet.