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Have you ever wondered what is the difference between a locking liner and a frame lock? What is SpeedSafe and how does it work? Some of your questions might just get answered here in Knife Technology. Please see below descriptions of some of the most popular features offered on their knives today. As always, if you have any additional questions please to not hesitate to Ask Us A Question. Thank You!

Back Lock
This is a very common way knives lock in the open position. They are also called Lock-Backs. This lock acts as a spring and it rides on the back arc of the blade as it rotates open and closed. To open the knife, grasp the blade with two fingers, or use a finger nail to slide into the nail-nick if provided and slowly rotate the knife open until it clicks. Now it is locked in the open position. To close, as the illustration shows, press down on the lock with your thumb and with the other hand carefully close the blade back into the handle.
Frame Lock
Locks the blade into position after the blade is deployed. The actual frame is what locks the blade in the place

To release the frame lock simply press the spring loaded lock and the blade will easily fold back into the handle.
Locking Liner
Locks the blade into position after the blade is deployed. There is a liner inside of the frame that locks the blade in place. This type of liner is used on knives where the handle is attached to the frame. (ie. Aluminum Handle)

To release the locking liner simply press the spring loaded lock and the blade will easily fold back into the handle.

What is SpeedSafe?
SpeedSafe from Kershaw Knives revolutionized the knife industry when it was first introduced on the Ken Onion Chive. First off a knife that features SpeedSafe technology is not considered and automatic knife. The correct classification is an “Assisted Opening Knife. There are two variations of SpeedSafe. One being a “Flipper” where the user uses their index finger to deploy the blade, and the other the user uses the thumb stud found on the blade for deployment. Both variations require the user to apply manual pressure to overcome the resistance of the torsion bar. This is why a SpeedSafe does not meet the definition of being classified as a switchblade. A SpeedSafe will not deploy with the push of a button or by gravity alone. Once open, the blade locks safely into position until the user releases it. A key advantage of a SpeedSafe knife is that many of the models are ambidextrous, and can be opened just as easy by either a right or left handed person.
Is a SpeedSafe knife a switchblade?
NO! There are many unique features of SpeedSafe knives that make them quite different than knives that are considered switchblades. Unlike a switchblade, SpeedSafe blades DO NOT deploy with the push of a button in the handle or by gravity alone. Instead, the user must manually overcome the torsion bar's resistance -- using the thumb stud or Index-Open protrusion on the blade itself -- in order to engage the SpeedSafe system. Because the user must manually overcome the torsion bar's resistance, SpeedSafe knives fall fully outside the Federal definition of a switchblade. However, due to the complexity and constantly changing nature of these laws and regulations, it is impossible for Kershaw Knives manufacture or The Kershaw Store to be aware of every restriction in every location in which the knives are sold or carried. It is the responsibility of the buyer to investigate and comply with the laws and regulations that apply in his or her specific area. At The Kershaw Store, we are proud to be able to offer this convenient, secure technology.
Tip Safety Lock
The tip lock available on many of the Ken Onion SpeedSafe models provides added security to assure that the blade will not deploy while clipped into your pocket.
Blade Safety Lock
The blade lock located on the spine of the handle provides added security to assure that the blade will not deploy while clipped into your pocket.
Full Tang Construction
The inside construction of the handle and the portion where the blade connects to the handle on a fixed blade knife is called the Tang. Full Tang is the strongest type of construction on a fixed blade knife and is apparent when steel is exposed all the way around the outer edge of the handle and sometimes protrudes out the end. See illustration.
Blade Trader Changeable Blades
Grasp the handle and, with your thumbs, press upwards on the underside of the Quick-Lock mechanism, continue pressing upward on the machanism until the blade and "bow tie" are exposed. The blade or tool can be removed from the "bow tie" and a new blade or tool seated onto the "bow tie" (when seating the blade or tool onto the "bow tie," make sure to guide it into place, top edge first, if you attempt to start with the bottom edge of the blade or tool the quick-lock mechanism may not return to its down position). Complete the task by returning the mechanism to its closed (down) postion as shown by the red arrow.

It is normal for a slight gap to be visible from the under side on the quick-lock mechanism between the blade and the handle, exposing part of the "bow tie".

Replacement parts for sets greater than 5 yrs old will not work w/current models
Reversible Pocket Clip
The pocket clip on Boa (K1580 & K1580ST) & Random Task II (K1515 & K1515ST) models can be located on either side of the handle. 
Reversible Pocket Clip
The knife handles on some models are drilled for both tip-up and tip-down clip carry allowing the clip to be rotated 180° on the handle. (Tip Up or Tip Down refers to the tip of the blade in which way it is pointing when the knife is secured using the clip.)

Removable Pocket Clip
The clip can be removed completely.
Correct Way
This is the correct way to carry your knife. It can also be carried on the outside of your pocket if you so desire. The pocket clip is just that, designed for the pocket not a belt
Incorrect Way
Your pocket clip is not designed to be clipped onto your belt. This will cause damage if not breakage of the clip.
Fact Sheet About Kershaw Knives & Speed Safe Knives

Ambidextrous Opening (No need for a left handed knife.)
Kershaw tries to accommodate both right and left hand users the best they can. Now this is not always possible on every knife, but when you see their knives that claim they are Ambi-opening, this means those knives can be opened by a right handed or a left handed person, and sometimes they can be closed by both too.

Thumb Stud
This is a knob, disc, or an attachment to the blade near the handle of a folding knife that allows the user to open the knife using one hand. Many times this can be done with either the right or left hand on models that offer ambidextrous opening.

Glass Breaker Tip
It's small, but it can be a real lifesaver. In an emergency, a sharp blow with the carbide tip cracks windshield glass—enableing trapped accident victims to escape.

Pocket Clip
The Kershaw pocket clip is just that, a pocket clip. It is not to be worn on the belt, as this can be an unsafe way to carry your knife. It is meant to be clipped with the handle on the inside of your pocket and the clip is on the outside of your pants.

Many of their models that come with clips can be kept all the way inside your pocket, as in rolling around the bottom of your pocket. It can also be used as a money clip. This clip may be removed if you choose.