The shaft is curved and formed mostly of three balls with little ticklers all over them. There is also one little nub on the bottom ball and two little nubs on the second ball for added stimulation. The nubs also have ticklers attached there as well. The shaft is pliable yet also rather firm. It's easy to insert and the unique design of the curved shaft formed of tickler covered balls is definitely nice over your average, more simple curved toy. The texture and design is awesome.