Those are scissor lifts (or similar type support structures).
You can extract limited amounts of DNA from tanned leather. You could determine what species of animal it was made from. But the tanning process, by design, does massive chemical damage to the material. Basically, tanning is intentionally causing every chemically reactive site to react in a favorable way so that it doesn't react in a unfavorable way later.The kind of precise DNA matching that they commonly do for criminal cases to match a sample to a particular individual would be very very difficult, if not impossible, for even the best DNA labs.