Summarize this article in one sentence.
With both the handle and head of the tomahawk complete, you can put the pieces together. Start by sliding the head of the tomahawk into the 1” slit you made in one end of the handle.  The placement should leave the majority of the larger, rounded edge protruding from one side of the handle with only about 3/4” of the triangular point protruding from the other side. If you chose not to cut out a design and you’re still using the full rectangular head, then it’s important to make sure about 80% of the head is off to one side of the handle. If the head is too balanced in the handle, then the tomahawk will not rotate correctly when you throw it. With the head of the tomahawk properly set in the handle, you can tape it in place. Tape around each part of the groove with a liberal amount of tape. You want to make sure that the head of the tomahawk doesn’t jiggle in the handle at all. Since the design is just paper, throwing the tomahawk will pretty quickly lead to wear and tear on it. If you have some duct tape handy, you can easily reinforce the tomahawk by wrapping the head and connection to the handle. Now that you’ve made your tomahawk, you should get some practice throwing it. Set up some targets—away from anything fragile—and throw the tomahawk at them by gripping the handle, lining up your aim with the target, and throwing the tomahawk with some spin to it. It should rotate end over end toward the target. The rotating motion actually stabilizes the tomahawk’s path the same way rifling on a gun barrel spins a bullet to stabilize it’s trajectory!

Summary:
Insert the head of the tomahawk into the handle slit. Tape the head in place. Reinforce the tomahawk. Throw the tomahawk.