Razor scraper handle for 1.5 inch / 39mm wide razor blades. Carefully bend the plastic to insert the razor blade (I use a pliers to hold the blade when doing this). Removing the razor is much more difficult.
This design needs good layer bonding otherwise it will be too weak. Even then I wouldn't recommend using it for prying parts off a print bed. You'll also need to be able to print thin gaps and secure bed adhesion.
Printed in translucent orange PLA at 100% infill.
Newer version is available at http://www.thingiverse.com/thing:1072713