The Russian Knout ( pronounced k'noot - to rhyme with boot) was a savage, brutal instrument of flogging.  It was introduced by Grand Duke Ivan III, (r.1462-1505) .  For centuries it served as the official method of corporal punishment under the Tzars.  Various forms of this whip existed.  Depicted here is the form with multiple leather thongs; some tipped with metal rings and one tipped with a sharpened metal hook.  A punishment of 100 lashes was almost certainly a death sentence.  Even a "light" sentence such as 20-25 lashes could maim the victim.