I EDC This Leatherman c301 . It opens very fast but has no springs to break down like other assisted opening knives. This knife is available straight edge or combo, I have the combo, and had no choice since it came with the LM Blast, and I thought I would prefer the straight edge better, and still probably do, but now I like the serrated feature. Great for sawing through things quickly.

The knife alone is probably $30. Walmart and Target usually have it.
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EDC, Mini PSK, PSK, Fishing PSK, Diaper Bag Kit, Portable Office, Vehicle Kit (X2), 72 Hour Kit, 7 Day Kit, SIP Kit and a Kit-Kat. Oh yeah, and a FAK (X10). Now where did I put the Tums?