Grade 5 Hex Cap Bolts Screws, Nuts, Washers, Lock Washers Assortment Kit - 574 Pieces!

Do guys carry a cabinet like ive seen (durham?) that these boxes will fit into. Id like to get 4-5 assortments.

Where is it manufactured?

is it a metal case or plastic?

Why is a Bluetooth Speaker pictured for what is supposed to be a hardware assortment?!?