Hole, of course-- the single most intuitive, simple, practical & useful way to ever open a knife...
but equally useful, and also a Spyderco innovation...
The Pocket Clip!!! :thumbup:
A real game-changer...before the era of pocket clips, when I went jogging or played ball there was no option...I had to go bladeless...
But after buying my first Spyderedged Delica in ATS55 that's not a problem anymore.
And after I bought my gray vg10 Caly Jr...well...it really broadened my horizons...because after that I have Clipits stowed and ratholed everywhere. I currently have a black zdp clad Caly Jr. clipped to the pocket of my bathrobe as I type.