The Saw Cleaver Trick Weapon from Bloodborne, scaled to be a Dummy 13 accessory.

One of the trick weapons of the workshop, commonly used in the hunting business. This saw, effective at drawing the blood of beasts, transforms into a long cleaver that makes use of centrifugal force. The saw, with its set of blood-letting teeth, has become a symbol of the hunt, and only grows in effectiveness the more grotesquely transformed the beast"

The hinge prints in place, and is delicate. Depending on your filament and printer calibration, snapping the hinge into motion may be difficult to do without breaking the part. Once active, the hinge snaps to two positions. If you have trouble with the hinge pieces fusing together during the print, you can increase the X-Y hole compensation to something small like 0.05 to increase the separation between the parts.

AMS and single-color 3mf files provided. Prints flat without supports. 0.15mm layer height.

In the photos, I added elastic self-adhesive athletic tape with some smudges of red sharpie.