What is different about this flipper? I haven't seen that many pictures that show it, but it looks pretty much the same as any other that I've seen.
See here for details:
http://kershawknives.com/productdetails.php?id=437&brand=kershaw
Handle: pretty ergonomic. Not very neutral like the Leek or Ener-G handles, but very grippy. Pocket clip can be placed tip-up RH and LH, or tip-down RH only. Nice smooth tension in pocket. Thumb can be placed in the dip in the handle when held without using the choil. Tip of pocket clip is a possible hot-spot.
Blade: 3.15 inches from tip to handle, 2.9 inches of useable edge.
Sandvik 13C26 holds a smooth polished edge and resharpens easily. Responds well to stropping on jeans and cardboard. Nice high hollow grind, lot of straight edge with about 1/4 of slightly curved upwards to the point. Kind of modified drop-point shape.
Lock: Probably easier to show than explain. Basically, a locking plate with springs at the butt. Tang of blade has two rods that move in and out of the locking plate. The texture on the button is kind of harsh but easily remedied with some sandpaper (note, this removes the black anodizing on the ridges) - picture in the Kershaw Knives link in the beginning has a different locking button (mine is APR 2008, could have been changed).
Apologies for crappy pictures (old cellphone).
Opening action:
Very smooth (PB washers!). Assisted opening... but better:
explanation available if you click on the photos above. Nice, strong detent, that doesn't impede flipping at all - the lock helps propel the blade open. The three studs actually work very well, they don't get in the way as much when you cut vs larger thumbstuds, and your thumb basically "rolls" from stud to stud as the direction of pressure changes. It also provides a larger "area" on which your thumb presses, thus reducing chance of your thumb slilpping. The flipper can be a bit harsh on the index finger - you kind of have to pull on it angled sideways, rather than having the index finger parallel to the handle (this places your thumb on the pivot rather than near the lock button). The flipper itself conforms to the choil (rather than being a "guard" like the typical flipper).
Below is a terrible video of me using three methods to open the blade. Flipper, then using thumbstuds, and finally, pulling back on the lock and flicking open and closed (I still need practice

). Beware the grainy action!
