The Hercules DG307B is the most adaptive 2 in 1 tablet and phone holder for your home or studio. FEATURES TightVice locking mechanism ensures your device is safely locked in place Wider supporting range compatible with phones/tablets ranging in sizes from 6.1"-13" Attatches to a desk, round and square tubes like keyboard stands, microphone stands or music stands SPECS Mounting Options: ¼"-20 threaded hole, adaptive desk/tube clamp Desk Thickness: 15.8mm - 30mm (0.6"- 1.2") Tube Diameter: Round Tube: 18mm25.4mm (0.7"- 1"), Square Tube: 10mm25mm (0.39"- 0.98") Net Weight: 570 g (1.26 lbs) Load Capacity: 3 kg (6.6 Ibs.) Folded Size: 260mm x 95mm x 115mm (10.2" x 3.7" x 4.5")