11" Inch Friction Articulating Magic Arm for DSLR or Mirrorless 11" Inch Friction Articulating Magic Arm for DSLR or Mirrorless Material: aluminum alloy/stainless steel/45#steel Color: Black The product can be used in any angles. When you adjust an angle, screw knob in the middle, which can lock 3 movable joints. The two tops are 1/4 screw bolts, on the other side are 1/4 screw hole, 3/8 screw hole, hot shoe plug-in interface etc. 1 x Magic arm