The strap holds the seat to the wooden base on certain older Ekornes Stressless recliners. 

No hardware included. 

I have multiple straps for sale, so, the one you receive may not be 100% identical to the one pictured. However, rest assured that you will be receiving a genuine Ekornes Stressless strap, part number 08005004 in the diagram, that is untorn/unripped and ready to be put to use immediately.