Cool design, they work good, look good, the metal is a lot softer than I would like (they are not grade 8 like I had hoped) ), the socket of the hex wrench will be "rounded" in the middle - the head of the hex wrench will rotate as you tighten it, in places where a regular socket won't work and a regular wrench will have the same effect - rounded ones corners of the bolt. Flat washers can be modified slightly to fit better in places.