The Delica is perfectly usable as a defensive folder. Erik Remmen proved that long ago with his Delica-oriented classes for law enforcement and the general public.
The key advantages are:
- legal blade length virtually anywhere in the US (your Endura, Police, Military, may be frowned upon by LEOs in cities such as Seattle or Atlanta)
- lightweight (carry it anywhere, carry a couple)
- cheap and easily replaceable
- great ergonomics
- decent edge geometry
The real issues with any self defense tool are training and attitude.
Despite all the wonderful marketing hype (and I'm definitely not picking on Sal here, but other manufacturers), don't believe for a minute your black, tactical, wonder knife is a magic wand that when waved is going to get you out of trouble.
If you don't have the training and mindset to use a knife as a defensive tool, your odds of survival start to diminish.
Think you need that supposed SEAL issue knife for defense? Compare the number of people who are sliced and diced (fatally or not) with box-cutters and kitchen knives to those cut with AFCKs, Militarys, Emersons, etc. Hmmmmm.
At a recent Bujinkan knife seminar, Brin Morgan (a very respected 11th dan who trains SAS and similar folk) was asked about the best type of defensive folder. He said he went through a stage where he had a certain knife for a certain environment or mission, but then realized once the training was ingrained it really didn't matter. At that point, "a knife is a knife. It has a sharp edge. You use it correctly to cut or stab."
Joel