Available in surface mounted & recess mounted options, metal floor joint covers are generally for larger joints of up to 150mm wide.
They also have a high movement range of up to ±100mm with some metal floor covers being able to close up to 100% (as long as there is nothing else within the joint such as a fire or moisture barrier).
Metal floor covers generally require very little maintenance due to their durable construction, with very few (if any) perishable parts.