The product description describes this as "spring assisted" which is tecnically "switch blade" so I was wondering if this is legal in all states.

I Think this should answer your question. (I found this on wildbillwholesale.com)Switchblade knives were invented in the early part of the 20th century. During the 1950's the switchblade got a bad reputation as it was identified with gangs which were popularized by such movies as "On the Waterfront", etc. As a result in the late 1950's most states passed laws outlawing the possession of switchblade knives. A Federal statute was passed to make it unlawful to ship switchblades across state lines, unless being shipped to a law enforcement or military agency. Here we will explain the difference between illegal switchblade knives, and legal spring assisted opening knives.All switchblades have some characteristics in common. They have a spring which exerts constant pressure on the blade. The knife is held in the closed position by the mechanism of the knife. This mechanism is released by depressing the button (which all switchblades have), allowing the stored energy the spring is exerting on the blade to propel the blade from the handle and open the knife. It is important to remember that the natural position of the switchblade knife is OPEN, it is held closed only by the locking mechanism.On the other hand, the natural position of the spring assisted opening knife is CLOSED. There is no pressure being exerted upon the blade, and there is no button to push. Spring assisted knives employ the following opening methods:1) A "Flipper" or lever which is located on the back spine of the knife. This flipper is actually an integral part of the blade which protrudes from the back spine of the knife when it is in the closed position. This is the most common opening mechanism of spring assisted knives.2). A thumb stud, the same as is found on most all tactical folding knives.In either case, either flicking the "flipper" or pushing out the thumb stud begins opening the blade, at which point the assisted opening mechanism takes over and finishes opening the blade. Performance wise, there is very little (if any) difference in the opening speed of a switchblade and a spring assisted knife. However, the differences in the way they are made make the spring assisted knives legal in all 50 U.S. states (They are not legal in the 5 boroughs of New York City, but this is because all locking blade knives have been held to be illegal in NYC, not just the spring assisted ones)

How to close the knife? I opened it and seems it's stuck. Thanks!

Within the sleeve there is a lever that locks it into an open position...push it to the left and close the blade.

well i just recieved one, and i opened it and i cant get it to close...

On the top of the handle near the blade's hilt or pivot screw there should be a raised nub of metal with lines going across. Pull rearward on this with your index finger to open the knife. Unlike a switchblade where the knife blade is ejected from inside the handle of the knife, these blades pivot open in an arc from the handle. To close the knife there is a piece of the underside of the knife integrated with the handle that locks the blade in place. You must push this piece to the left with your thumb while simultaneously pushing the blade toward you with your index finger. One the blade is at a right angle to the handle move your thumb to the back of the blade and continue to pull it toward you until it is safely inside the handle. Note this is a guide. Not responsible if you cut yourself by coming in contact with the blade.

How does this knife (and the family of knives) compare with a Kershaw?

These don't hold a candle to Kershaw, CRKT (Columbia River Knife & Tool), Gerber, Zero Tolerance, Emerson, Spyderco, etc. I own over 50 different "tactical" knives for all situations. Tac-force is decent around the overnight camping trip or canoeing. Fine at the house, the shop or to use at work or on farm. and in the event one were to lose it. Your out less than $20 instead of $50-$500. Not meant for downrange or working in the drink. It is as advertised and I plan to buy a few more just to keep. Also, don't use these to gut and clean wild game. Those of us who do alot of hunting should have set of blades and other tools for that purpose.

Recommended Uses For Product	Men's Accessory, Fishing, Hiking, Hunting, Camping, Bushcrafting
Brand	Tac-Force
Model Name	TF-705BK
Special Feature	Folding Knife
Age Range (Description)	Adult
Included Components	Pocket Clip, Bottle Opener, Glass Breaker
Handle Material	Aluminum
Color	Black
Blade Material	Stainless Steel
Style	Modern
Blade Length	3.25 Inches
Theme	Tactical
Product Care Instructions	Hand Wash Only
Hand Orientation	Ambidextrous
Item Weight	4.66 ounces
Blade Shape	Drop Point
Blade Edge	Partially Serrated
Is Cordless?	Yes
Reusability	Reusable
Package Type	Standard Packaging
Item Length	7.75 Inches
Global Trade Identification Number	00795467405429, 00805319424581
Size	3.3"
Manufacturer	Master Cutlery LLC
UPC	805319424581 100000915554
Item Package Dimensions L x W x H	5 x 1.65 x 0.94 inches
Package Weight	0.13 Kilograms
Item Dimensions LxWxH	5.25 x 1.75 x 0.75 inches
Brand Name	Tac-Force
Warranty Description	Limited Lifetime
Material	Other
Suggested Users	Unisex-Adult
Number of Items	1
Part Number	TF-705BK-MC
Model Year	2019

Tac-Force Folding Pocket Knife, 3.25-inch Serrated Blade, Black Aluminum Handle, 7.75-inch Overall Length TF-705BK

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