Are these tools used for some special funerary rituals? They looks a little bit abstract.
Yes, those are extremely early tools that were used in rituals that would become central to Egyptian religious practices.
The arrowhead-looking object would be used to ritually "open the mouth" of statues being placed in tombs - so that they could eat offerings of food in order to nourish the soul in the afterlife. Living priests or family members would bring fresh food (bread, beer, meat, etc) and leave them outside of tombs for the deceased. Everyone hoped that when their time to die came, that someone would leave food at their tomb.