Robus For 2.6 to 4" Wide Smartphones, 1/4"-20, 3/8"-16 & Arca-Style Mounts, Ballhead with 3 x 90° Notches, 3 x 1/4"-20 & Cold Shoe Accessory Mounts, Manual Clamp with Knurled Knob, Use as a Stand with Fold-Out Foot, Knurled Locking Knob for Ballhead,...