Here is another cool gift idea for gearheads in your life. This engine block key holder is 3D printed. It has a moving mechanism as you attach your keys. It has a total of 34 pieces. Each of these takes about 15 hours to assemble. There are 4 holes on the back that you can use it to hang it on the wall.
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This engine block key holder is available in two models, including a premium edition that has a smooth moving mechanism.
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