The trays were designed to fit into a customized Frog Box.  While the FrogBox is fine (see it here), I do intend to modify these models to fit into the T-Stak toolbox I keep my electronics tools in.

But the trays are designed to be stackable, with magnets aligned to hold them together, and slots for elastic straps to keep the tools in place.  The lower tray is slightly larger, so it fits tightly in the FrogBox, and the upper tray is a little looser to make it easier to close the lid, though may not really be necessary.

Here's what each file is for:

• xl_Frog_Rugged_Box_bottom_Crimper_holder.stl 
  • IWISS IWS-3220M
  • KLIEN TOOLS 1019 Wire Strippers
• Frog_Box_electrical_PA09_PA20
  • Engineer PA-09
  • Engineer PA-20

Printed with 15% infill with Cubic Subdivision.  If you look at the photo's, you'll see bubbling in the bottom, which is why I recommend 20-25% infill instead and at least 4 top layers, 5 would probably be better.

The remix of the FrogBox is based on this model https://www.thingiverse.com/thing:4838803