Hello,
Finger Knife ("Ngigolio") from the Turkana or Pokot people of Kenya | ca. 1986 | Metal and copper wire
Thumb ring knife from the Turkana people | Aluminium and copper | Late 19th to early 20th century
Wrist Knife with Cover ("Abarait") from the Turkana people of Kenya | ca. 1986 | Metal and leather.
and this link:
http://www.pinterest.com/pin/356769601700881963/
I hope it can help.
Kubur