Answer:
During the 1800's these turned women into hourglasses and is becoming more popular again these days
Though I have neither legs nor feet, my use is for to go; Although I cannot speak, I tell what others want to know
When it comes in, From sea to shore, Twenty paces you'll see, No less, no more.
Scythe of darkness, Shadow’s light. Guiding eye of thirteenth sight.
What hangs others yet can unintentionally hang itself?
I have two bodies joined together as one. When standing still I run and run.