Wrist Knife Eastern Africe; Kenya; Turkana Iron, Aluminum, Leather 4 3/8 x 4 1/8 x 1/4 ins. (11.1 x 10.5 x .6 cm) The first implement is a wrist-knife, which is worn as a bracelet. The iron blade is sheathed with two bands of leather. The inner leather band protects the wrist and the outer covers the sharp end of the blade. The outer band has two metal ends.