Instant visual auditing of the system is made possible by the use of two colour, high reflective contrast foam inserts. These inserts are made a durable engineering plastic resistant to most fluids encountered in the industrial / aerospace environment.

The three-dimensional shape of each tool is precisely replicated in the foam to allow the tool to be positioned in the foam to the most appropriate depth.

A unique step-down feature is included to allow removal of the tools without resorting to finger holes. This is of particular benefit because it restricts the colour contrast to the exact shape of any missing items.