About this 3D model

Heavily remixed from mathiaspl20 design from Thingiverse Designed this as a fidget toy that doubly functions as a letter opener, yet looks tactical enough to be cool. You'd need a single rubber band and a well tuned 3D printer with tight tolerances. I use Cura and have the setting for "inset" at 0.04mm so that parts snap together tightly. It works amazingly well for me. Disclaimer: Use responsibly and with caution. The blade edges and tip can be rather sharp, though they've been designed to have a thickness and the tip has been rounded. Check this link for a fully assembled unit in action:https://www.youtube.com/watch?v=kV11zkvkbB4 Check this link for assembly instructions:https://www.youtube.com/watch?v=i-qvsf0v_p8 Check this link for how it opens an envelope:https://www.youtube.com/watch?v=fDOC8Gz6-3w