This menacing looking tool actually does something quite simple. To discover what it is,

Believe it or not, it's actually a lemon squeezer. Designed by Nicole Schaffert, it's made of 18/10 gauge stainless steel and is meant to be inserted into the lemon, lime or orange. Just squeeze it for a quick and easy seed-free juice. Available for $12.50.

Source: Stylehive