S23E11: Slate Tiles, Hot Dog Carts, Garage Door Openers, Bicycle Seats

Natural slate is split into thin layers, cut to size and finished as durable roofing or flooring tiles. Stainless-steel bodies, cooking equipment and storage compartments are assembled into hot dog carts; motors, tracks and remote-control electronics become garage-door openers; and moulded bases, padding and covers are combined to produce bicycle seats.