Replacing screws.
When replacing a screw (or nut) in inaccessible places I have found suitable sized heat shrink sleeving useful. With a screw it can secure the screw firmly to the end of the driver so that a jungle of wires and components can be negotiated easier than with fingers. It can even been used alone to give some flexibility.
With a nut it makes a flexible box spanner to get the nut started. This is helpful when the screw is easily accessible at the top of the chassis but the nut though visible is under a bird's nest of components.
I usually find the sleeving can be pulled off when secure but on occasions it might need the sleeve wall cutting to release it.
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