Push dagger

A push dagger (alternately known as: push knife, gimlet knife, fist knife, Stoßdolch (German), push dirk, T-handled knife or punch dagger) is a short-bladed dagger with a "T" handle designed to be grasped in the hand so that the blade protrudes from the front of one's fist, typically between the index and middle finger. Over the centuries, the push dagger has gone up and down in popularity as a close-combat weapon for civilians and selected military forces.