A push dagger is a type of knife that is held in the fist with the actual blade coming out between the second and third fingers. The knife itself forms a "T" with the blade being slightly curved or straight. The knife is mainly utilised for self defence to enhance one's punching ability by adding a blade. Though these knifes may be difficult to find, there are ways in which one can actually make his own push knife
Carve out a cylinder out of a block of wood that is about 3 to 4 inches long, 1/2 to 1 inch deep and no more than an inch wide. The handle should be made of wood or a crafting metal and easy to manipulate. The handle itself should be no longer across than what can fit into your hand. On average, this should be about 3 to 4 inches, though this may vary according to your preference. The handle can be made out of a standard piece of wood roughly 5 inches long and 3 inches wide, being about 2 inches deep.
Cut a dip in the middle of the handle that goes halfway into the cylinder. This dip should be no longer than 3 inches, ideally being about 1 inch. Make sure the cylinder is still solid after cutting this groove.
Insert the thin end of the blade into the groove. The short end of the blade should have a hole in the bottom for the screw. Once it is all the way at the bottom of the groove, screw the screw into the side of the handle right through the wood and into the hole of the blade. Make sure that it is tight. The screw should not be long enough the go all the way through the handle. Once the blade is mounted, the knife should be ready for use.