Old handcuffs
How does the key work? Does it unscrew or pull a pin?
They need opening and restoring with a new key but they are so corroded inside they are solid.
The pins/shafts have no shapes or markings on their ends so either a shape the key fitted has worn or snapped off or they work some other way.
I don't normally come across these, in fact it's my first time having to work with handcuffs, I've had them since November last year and need to get them out the shop.
Any pointers?