Inside the Ersatzteiliste (parts manual) for the Bf-109E is a special tools section. Before now, if you wanted to add this to your diorama, you were limited to scratchbuilding it, and then you still had to find the tools to fit. Eduard has made this a lot easier.
Contained on a single brass fret is a roll of tools, a special tool kit, and all the tools for both. The first assembly sequence is a tool roll which can be looped over the wing. There is a second one that is all folded up. These are both perfectly formed and textured to give that canvas look. The tools fit along a canvas strap. It might be easier to add this strap from tape, but the PE part is quite adequate. As a personal aside, my thought is to use the Eduard PE part as a template to cut the “canvas” roll out of masking tape, both for scale thickness and that more realistic canvas texture that masking tape suggests.