This is a rotating joint for creating lamps with EL wire and clear 1/4" acrylic tubes.
Use a low-profile m3 nut and bolt through the centerhole to and tighten when you decide on the angle you want. Cut 1/" acrylic tubes to the lengths you want and link them together with as many joints as you want for your design. Run the EL wire through the acrylic and around the joints being careful not to bend the wire too sharp. Tighten the m3 nut and bolt on every joint to keep your design rigid, then turn on the EL wire!