Thanks now everyone can see them.
I had to cut those trees anyway to clean the area, so i decided to try to use them.
Old people from my place only use chestnut trees to craft poles, so i don't know very much about black locust, even if they are everywhere.
Sapwood is quite thick, i hope it will dry with time.
I will soon sharpen them and when they will be ready i want to burn the part that goes underground. Maybe the'll last longer