Hollow wood thing. What is it?

I'm not even sure what to call it.
It's wood or bamboo. 16" long and about 3" diameter
The center is ribbed with the two holes.
and a moom shape cut on one end
Both tips have metal inserts on the tips.
There are two different pictures on the ends.
That's about all.

Mikey

 

It is some sort of musical instrument - played with a stick or wand of some sort.

 

Hello,

That is a güiro! It’s a Latin American musical instrument, it’s missing it’s accompanying little wooden stick/mallet. You rub the stick along the ridges to produce the sound.

 

Very nice.
thanks BMRT and Mansons for the quick responding.