A steel stamp or punch manufactured by toolmaker Pryor of Sheffield. The stamp tapers to one end with an embossed broad arrow. It is undated but is unlikely to be no earlier than the Second World War. It would have once been used by a manufacturer to stamp metal components or products made to War Department contracts.
The unauthorised use of the broad arrow stamp was, and likely still is, illegal as it falsely identifies items as being manufactured to military contract.