Batman Batarang,

selfmade, obviously inspired by the batman movies but my own design,

i did not make the edges thinner, so you can kind of throw them without them always breaking,

maybe you have to scale a bit but not too much,

i printed with PLA but should also work fine with petg or other filaments

Settings are 45% infill, 2mm layer height, no supports obviously, 2 walls, I used 14cm lenght and about 3 mm height and it feels good. 

Have fun!