I was at the hardware store this morning. I bought a hammer. It sure seemed like a product... with the whole "being displayed on store shelves" and "available f

I was at the hardware store this morning. I bought a hammer. It sure seemed like a product... with the whole "being displayed on store shelves" and "available for purchase" thing. There were several different hammers there, bearing different branding and having different manufacturers. I don't quite get the distinction...