It is important to be aware of weapons which may potentially be used by either yourself or an attacker. Weapons can be either purpose made, such as firearms, or improvised, such as using a handful of change to distract someone. On the personal scale, weapons fall into four broad categories (with a few potential exceptions): projectile weapons, edged weapons, blunt weapons, and distraction weapons (see the various articles on these weapon types). It is important to consider weapons that you might have access to (and whether you are justified in using them, see Legality of Self Defence) and also weapons that an attacker might be carrying or be able to reach.