What does Qur'an 75:4 mean by using an example of fingertips?

I was going through the translation of Surah Al Qiyamah and I came across the expression in [verses 3-4](http://quran.com/75/3-4) which reads, > 3. Does man (a disbeliever) think that We shall not assemble his bones? > 4. Yes, We are Able to put together in perfect order **the tips of his fingers.** This made me wonder, why is the expression of putting together fingertips used? There could be other expressions too, so what is unique about this? Please reply with your views and tafseer so that we get an entire view of this verse.