The artefacts in this case are examples of familiar products that have been given new purposes. Their original use has been superseded because of changes in technology, because the edge has been taken off their performance, or because they are at the end of their natural cradle to grave life.
The extent to which their original form is modified varies. Some have been left as they were but placed in a new context while others have been cut, carved and even re-shaped as part of their repurposing. What they share is that immediate recognition of their former life is a crucial part of their current value.