What is Fetters?

Legal Definition
A sort of iron put on the legs of malefactors, or persons accused of crimes.

2. When a prisoner is brought into court to plead he shall not be put in fetters. 2 Inst. 315; 3 Inst. 34; 2 Hale, 119; Hawk. b. 21 c. 28, s. 1 Kel. 10; 1 Chitty's Cr. Law, 417. An officer having arrested a defendant on a civil suit, or a person accused of a crime, has no right to handcuff him unless it is necessary, or he has attempted to make his escape. 4 B. & C. 596; 10 Engl. C. L. Rep. 412, S. C.
-- Bouviers Law Dictionary
Legal Definition
Chains or shackles for the feet; irons used to secure the legs of convicts, unruly prisoners, etc. Similar chains securing the wrists are called "handcuffs."
-- Black's Law Dictionary
Legal Definition
Manacles; shackles.
-- Ballentine's Law Dictionary