Police are trying to trace the owners of a toolbox that was handed in to Chesterfield station.
The black and red storage box, believed to contain specialist electrical tools, was handed in on Thursday, December 3.
A force spokesman said they had fallen from the back of a van on Walton Road at Chesterfield.
Images have now been released to try and track down their rightful owner.
If you have recently lost tools, and think they could be yours, contact Chesterfield Enquiry Office on 101.