Gridfinity-based holder for tin or aviation snips, like model 14-563 by Stanley. Others will also be compatible. To check for fitment on your snips, measure the distance from the tip to the finger rest. If it is between 150 and 165 mm, you're golden. The slot on the bottom serves two purposes:

1. Help the tool to sit level.
2. Prevent the tool from sliding if you keep it in a drawer.

Gridfinity size format is 1x5x8.