This kit saved my board.
I went to every local shop looking for a tp20s safety bit, I have both metric and imperial, I have 5/36, 7/36, 6/95. 2mm, different hex sizes. NOTHING FIT, all just too small or too big. But this kit... *chefs kiss* the bit fits perfectly. Don't waste your time like I did, Buy this if you need to get to battery.