The Eku is made from hardwood. It is shorter than the Bo. In principle the Eku is the same height as the wielder. The Monouchi extends one-third the length of the Eku. The Monouchi has 4 surfaces, the Saki, 2 Yoko, a beveled edge, and a rounded face.
The Eku is uniquely Okinawan. The Eku was a common place oar put to deadly use by the Okinawan fishermen.
The Eku uses the techniques of the Bo. However, the Eku requires more skill because of the necessary wrist action needed to use the proper surface. Use of the Eku requires excellent knowledge of Bo techniques.
The grips for the Eku are similar to the ones for the Bo. The right hand grips the Eku at the Moto right behind the Monouchi. The left hand is about one shoulder width down from the right hand. Like the Bo the back hand generates the power and the front hand is used for guidance and control.