This is a little project I worked on. It is designed for watchmaking. When disassembling a watch, you can store all the parts in the bottom of the tray, then put the insert in, put the case parts in, and put either a lid or another compartment on top. Alternatively, you can store multiple watches disassembles in one case using the inserts, or just use the inserts outside of the cases and put the separate lids on these. This can fit pocket watches also using the larger tray or the square tray.

To see more watchmaking tools, check out my profile, and please tip to help me do more of this.