Sirui Alien Series Crab Clamp with Magic Arm (Black) Fits Devices 2.3 to 3.7" Wide, Crab Clamp Opens from 0.6 to 1.97", Supports up to 7.71 Pounds, Includes Crab Clamp and Smartphone Clamp, Includes Magic Arm, 2 x 3/8"-16 Holes - 1 x 1/4"-20 Screw, 3 x...