For my new 3D printer build, I needed to tap the ends of aluminum extrusions, so I bought a set of hand taps to use. However, their square shank makes it a unique design and needs a appropriate wrench for it. There are many designs for it on the model sharing sites, but I disliked others because they featured excessive fillets on the bottom faces so made my own. Sharing it so others may employ it if they like it.
The author marked this model as their own original creation.