A 5x2 (3u tall) gridfinity tray to store the (quite popular) HSC8 6-4A & HSC8 6-6A ferrule crimp tools, sold under several different brands.

I also attached the 5x2 bin (6u tall, 12 labeled compartments) that fits right below to store most popular ferrule sizes with room to spare, perhaps for fork or ring connectors.

I also attach the fusion 360 file in case you want to make any modifications.

Although the carved shape has some wiggle room for the slightly different handle shapes that each manufacturer customizes, some of the most chunky handles may not fit.