Take it from me, if you already have this knife, leave it at home, better yet throw it in the garbage.

If you are thinking about buying this knife then you need to think harder.

If you push that thumb lever forward, the blade shoots out the front (hence OTF) of the knife via a spring. This knife is also called a stiletto or a subway knife, everything about this knife is illegal PERIOD

Taken from the Unique Blade website:

The Shrade OTF assisted opening knife, as opposed to an automatic knife, is not opened by pressing an activating button, it is opened by pushing up on the slider, located near the base of the handle. Now, the difference between an automatic front opening knife and this spring assisted out the front is that once you have started the opening of the blade, an internal spring finishes the opening process. That's right, once the blade is started, it slams open with as much force as a switchblade!

PC 656K:

For the purposes of this section, "switchblade knife" means a
knife having the appearance of a pocketknife and includes a
spring-blade knife
, snap-blade knife, gravity knife or any other
similar type knife, the blade or blades of which are two or more
inches in length and which can be released automatically by a flick
of a button, pressure on the handle, flip of the wrist or other
mechanical device, or is released by the weight of the blade or by
any type of mechanism whatsoever.