This is a custom insert that is designed to fit your Milwaukee Packout to better store your driver bits! Milwaukee 48228436 PACKOUT Low-Profile Compact Organizer.
 
Design by Jonah Pope
 
The design consists of the main tray insert and then additional inserts that slot in place that hold the smaller length driver bits. You can use one, both or none of these extra trays, it's all up to how you want to structure your kit. 
 
Packout and Tool NOT included.