Another visualizer for all your extruding needs and whosoever holds it, if he be worthy, shall possess the power of THOR!!!
…Anyways, check out this article by Mikolas Zuza if you've never made a visualizer before (https://blog.prusaprinters.org/visualize-extruder-motor-movements_7392/).
This model was designed with manual filament swap in mind, but looks good printed with a single filament as well. To make the infill lines run vertically through the hammer, rotate the print counterclockwise 45 degrees.
The hammer pictured was printed at 0.15mm resolution with 100% infill using a 0.4mm nozzle. I used sparkle black PLA(Hatchbox) for the bottom layer, wood PLA(Hatchbox) for the middle layer, and silver PLA(Prusa) for the top layer.
The author hasn't provided the model origin yet.