Men and women alike both carry pen knives due to their convenience
. This is the smallest pocket knife you can have, and it may be carried in a pocket of even the most than material and not disrupt the garment's drape. Many times these can be carried within a formal attire and remain undetected.
Some people like the extra functions of knives that come with additional tools such as pliers, screwdriver tip and even eating utensils. The most well known one of these is a Swiss army knife. Many knives of this style will only contain one blade with the many other tools.
Another style of pocket knife which is gaining popularity is the credit card knife. This can be placed in with your existing credit cards, giving you a tool that can be quickly and easily withdrawn from your wallet. While these are not as convenient to use as other styles, they can also include smaller tools like tweezers for extra amenities. The use of this knife can be awkward and you may not be able to do fine work with it.
Many knives will be slip joint which means that when they are open if there's enough pressure applied, the blade will close. Many of the multi tool knives and smaller pen knives use this mechanism.
The lock back knife is what is most closely associated with pocket knives. These lock into place and require an action to close the plate. Many times these will have a longer blade then other knives, but typically only contain one blade for use.
It is important to understand all of the safety and legal issues that arise with pocket knives. While carrying one is not necessarily against the law, your region may have different requirements on what is acceptable use of the knife. You should understand where in way and you can carry a knife and you should also understand the use and function for your own safety.
Pocket knives can be a useful tool to have on you. You will need to spend some time researching different styles and blades said that you can find one that you are comfortable with and can use. To take into consideration that if you have a play that is too small for the job at hand, it will snap and cause injury.