One set (one hex stand-off and one screw) for mounting an SSD into an open space on MSI or similar laptop.
This is usually used on laptops and is a M2 thread (that is, the metric M2, that happens to be for a M.2 type SSD... )
Desktop MSI motherboards usually are a larger size so this product is not suitable for those.
Stand-off is 6mm long and the threaded part is 4mm long, so 10mm total length. Thread size is M2.