Product review (4 stars): It feels pretty sturdy and the prongs don't wobble at all
Mine arrived but did not come with a fuse or fuse cover but did come w/ a second switch.  Keep in mind that not all applications require a 10 amp fuse and it varies from product to product.  I'm using this for a 3d printer which uses roughly 2 amps and a fan so I'm using a 3 amp fuse.  It feels pretty sturdy and the prongs don't wobble at all. It is a tad smaller than I was expecting but it fits standard computer cables with no problem.  The switches are rated for 10 amps, so if you put in a 10 amp fuse and your appliance shorts due to an unprotected line, it's just as likely to burn the switch as well as the fuse.  To figure out what fuse size you need, Google for "how to calculate fuse size".