Human hand-sized it is easy to reach all spots on your back and provide a larger scratch area for maximum satisfaction.

Pros: 

Note: This scratcher is intended to use without clothes covering the scratch area. It would be too big to fit inside your shirt.

 

Printing instuctions:

• print in PLA (mine is in galaxy black)
• 3 perimeters at 0.2-0.3mm layer height (I printed it at 0.3mm with 0.6mm nozzle)
• print on the flat back on top of the spikes - use brim for adhesion
• no supports needed
   

Designed with a 5.9mm diameter stick of approximately 32cm length. Feel free to adjust the hole to your stick size.

I recommend needle nose pliers to remove the brim - it looks like a lot, but is pretty quickly done. Depending on your preference, you can sand the spikes and or finger nails a little bit after.

Designed for the Scratchers contest.

Update: added click together handle ( tight fit; I used a vice to press securely in place)