Guitar String Tie Bead

These things are great for tying beadless strings like those on a classical or flamenco guitar. They allow you to tie the strings off away from the bridge, saving yourself some dents and scratches.

I don't recommend PLA for this. Nylon works great, and ABS might be fine, but I haven't tried it. You should also go for 100% infill to avoid buzzing and cracking; printing a set of six is only around 2 ccs anyway.