It is interesting :
Stair dust corners are flexible, triangle-shape pieces of brass or nickel that keep dust from accumulating in stair corners. They were introduced near the end of the 19th century as a way to simplify sweeping.
Mechateuthis is a mechanical giant squid as in the "megateuthis" squid. The moving parts are driven by 8 hand cranks. This imaginative use of steel was made possible by mechanical artist Barry Crawford and a GoFundMe campaign. This moving sculpture was part of Burning Man 2015