About 20 Brooklyn women received a free lesson on self-defense Friday evening at the Bensonhurst location of Tiger Schulmann?s karate.

The demonstration included how to block, punch, kick and escape from holds. The trainers advised participants to always be aware of their surroundings, walk and park in well-lit areas and never let gas tanks dip below a quarter full. They also advise keeping doors and windows locked.

Instructors say self-defense isn?t just about fighting, it?s about always being prepared to protect yourself.