A tempered steel nut cracker, also known as a surta, is a robust and durable kitchen tool designed to crack open various types of nuts. It typically consists of two handles with a hinged pivot point and a serrated jaw on one side. To use it, you place the nut between the jaws and apply pressure by squeezing the handles together, effectively cracking open the shell without crushing the nut inside. The tempered steel construction ensures strength and longevity, making it an essential tool for effortlessly cracking nuts for snacking or culinary purposes.