Let's just say having this will definitely protect your neck.
According to Cool Material:
"Frequently described as “the Mother of all Swiss Army knives,” this nine inch long, three and a half inch wide and thick device was actually produced by the John S. Holler Company of Germany in the late 1800s. Among the hundred plus tools (yes, you read that right) you’ll find: .22 caliber, five-shot, pinfire revolver, scissors, dagger blades, button hook, two saws, auger, corkscrew, lancet, cigar cutter, tuning fork, straight razor, writing implements and even a mirror. The tortoiseshell handle even opens up to reveal two compartments with even tinier tools."