It will never happen. Every one knows when you have a high quality tool set. Its the one they always borrow and rarely bring back without having been asked first. And it always seems to comes back with one commonly used piece missing.
Your grand kids will inherit the remaining 68 odd pieces of a 100 piece tool set. All common size sockets will be gone and have been replace with broken cheapo stand ins.
All screwdrivers will have been replaced with cheap ones and will have the ends broken or stripped off.
The remaining wrenches will all be the odd sized ones that were rough cut to the next approximate size during an emergency fix that occurred after the correct wrench disappeared.
The socket extensions will all have the ends bashed in to the point of no longer fitting the sockets from countless dummies using them as driving punches.
Every pliers and gripping tool will have so much weld splatter on them they are like grabbing a metal porcupine.
Most of the remaining items will also be irreversible corroded because some cat kept peeing in your tool box every time you left it open. Or having been eaten by the retarded dog and then found in the yard a year later after the dog dropped it off.
Thanks Grandpa!