Prayer beads or Mala or Rosaries are used by various religions such as the Roman Catholic, Orthodox Christian, Muslim, Hindu, Buddhist, and Sikh to count the repetitions of prayers, chants or devotions. They may also be used for meditation, protection from negative energy, or for relaxation to help a person to relax; to attain a state of increased calmness; or otherwise reduce levels of anxiety, stress or anger. In Buddhism it is a traditional tool used to count while meditating when mantras are used by the Mahayanist.
Some string of beads used in my daily prayers
so many different beads for buddhism prayers?
It is just an aid for prayer, chanting or meditation purposes. Over the years you tend to accumulate them from different countries you visit or given by friends. It also become a hobby collecting them. In my case, I used different beads on different days for my prayer and meditation routines.