Quoted from LTG:Fills the hole with bamboo and glue. Thus making it like new wood with no hole. Then when you put the screw back in, it's tight again.
LTG : )
I have a few days old nib and had an issue with the flipper board. The screws are not tight from the factory. They hold but not a tight fit I think they are predrilling the holes too large. Going to fill mine.