Knifehead is a "Series Two" mini-figure in the NECA Scalers series, released June 2014.
"Scalers are the hottest accessories yet to hit the world of electronics! These collectible minis for your cords and cables feature iconic characters from movies, video games, TV and comic books. They grip headphone cords, device cables and more, and feature an amazing level of detail. The Series 2 Assortment includes Iron Man and Spider-Man (MARVEL), Knifehead (PACIFIC RIM), Batman and Joker (DC COMICS), and Cornelius (classic PLANET OF THE APES). At only 2 inches tall, there’s room for a bunch on any cord. Collect your favorites and take them everywhere!"