look up lightning otf knives you will be happy you did. You can find them onsale at 25 bucks a pop lots of models.
Are they a $200 knife nope. I have 4 some are 5ish years old and have had no problems with them other than the metal case shows wear. Do I care if I lose it nope do I care if I pry with it nope that box needs opening sure thing. Plastic clamshell shred it.
They take a licking and keep on flicking.
nutnfancy or how ever you spell it did a review on them years ago nice long vid.
http://www.lightningotfknives.com/Products-LIGHTNING_OTF_KNIVES.html
Yep, I edc one now for 5 years. Best knife I've ever had. Can't believe it''s lasted this long. I use the crap out of it too.