In Professor Ronald  Duncan's Martial Arts Academy, you are taught to be combative with empty hand as well as with weaponry..As a practioner of ninjitsu and a student of Ronald Duncan, my self confidence  has increased 95% since I have been attending his dojo

92-24 Merrik Blvd. (between Jamaica Ave. and Archer Ave.)
Jamaica, New York 11428
718-558-5612

Classes are:
Mondays and Thursdays
from 7:30 PM to 10:00 PM
Saturdays
from 2:00 PM to 5:PM

There are many types of weapons used in ninjitsu. One such weapon is called Ninja Claws. This weapon could also be used for climbing.