TWO 1/4" SCREWS THREAD HOLE: Features two 1/4" screw thread holes under the bottom and the back of the holder to mount your tablet to a Tripod, Monopod, Selfie Stick, or any tripod ADJUSTABLE LENGTH: 6.3-9.25 inches/16-23.5 centimeters can be flexible adjusted by screwing in or screwing out the adjustment knobs PTOTECT RUBBER PAD: Features two rubber pads inside the two ends to protect your device from scratches, and also prevent the iPad from falling off COMPATIBLE: Compatible with iPad Mini, iPad 2/3/4, iPad Air/Air2, iPad Pro, Samsung Tab 7.0 series Supports and other tablets within 6.3-9.25 inches length MATERIAL: Made of sturdy but light plastic, 70g weight, more portable for carrying around and storage