How important is one-handed opening to you? The folding knife market has numerous options for whipping out your bad boy with just one hand: thumbhole, thumbstud, flipper, thumbdisk, thumbplate, your dog’s eyelid, etc. Does it really matter? I love one-handed deployment, but I can’t think of any practical situation where one-handed offers an advantage over the good ole nail nick. As for me, I’m usually a one-handed opening, two-handed closing kind of guy. No particular reason other than it feels cool to slam that Tri-Ad lock home singlehandedly.