The Benchmade Stryker is one of the most popular automatic (switchblade) knives on the market. There’s a reason – it’s just that good. The blade is made out of 154 steel which is very tough. It comes with a straight or serrated blade as an option. If you want one automatic knife, this may be the best option for you.
You can buy it at your local knife shop or BladeHQ here: https://www.bladehq.com/item–2011-Benchmade-9101SBK–7756
Note – this knife may not be legal in your locality. Please check and follow local laws.