Metal case with 7 tap drills (M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5, M12x1.75), 7 core drills (2.5, 3.3, 4.2, 5.0, 6.8, 8.5, 10.2), and a tap wrench for M3 to M12. With tap drills, you can cut threads into a drilled hole. A tap can be used to repair threads, but it can also be a good solution for a stripped screw. You can then slightly enlarge the hole and use a tap with a larger diameter to cut new threads into the hole.