Just in time for Christmas, everyone in your house can have their own package knife. This minimalist design is not designed for making a tough utility knife but a fast sharp edge for light duty when needed. Friction keeps things in place so tolerances are tight to keep the blade solid. Printed in PLA so shrinkage wouldn't be an issue.
Please see Post Printing comments below!
This was made to a specific common name-brand utility blade. Some may be thicker and not work. This was tested with blades of .60 and .65. Depending on many factors (temp, resolution and how clean your machine & software produce rafts) you may need to scrape any rough edges and just a drop of silicon lube give it very simple single thumb movement.
It's a really sharp blade and the design has no locking mechanism or safety features whatsoever. Use this at your own risk. I wouldn't carry it in a pocket without some form of encapsulation. It could easily slide past the edge and cause various undesirable outcomes. Keep it in your toolbox or drawer away from small children. Be smart... I assume zero responsibility for anything you do with this, make it at your own risk.