This is wooden disposable chopsticks that you can receive for free at many stores in Japan, when you buy or order food.
The feature is asymmetric shapes of cracked sides which are formed when you split the stick into the two.
Other images using the chopsticks are here(http://gappyfacets.com/2014/11/26/blender-cgi-realistic-disposable-chopsticks/).
Realy nice texturing!