XACTO Blade Pen

thingiverse

An XACTO blade pen thing, im not really sure what to call it, fits under a 9mm base-wide blade. Initially threading the cap onto the pen may be difficult, it was for me, I recommend using two pliers to initially thread the cap and repeat until the cap is easily removed by hand. This difficulty is likely due to the resolution of my printer so you may have better luck then me.