SmallRig Mini Magic Arm with Universal Dual Ball Heads & 1/4"-20 Screws Rotating Mini Ball Heads on Both Ends, 5.3 lb Maximum Load, 4.4" Total Length, 1 x Thumbwheel 1/4"-20 for Easy Mounting, 1 x 1/4"-20 Mounting Stud, Tightens with 1 x Center...