Made of custom, engineered composite and lightweight aluminum. Ideal for bicycles, motorcycles, poles or any round or semi-round tube. Includes the PortaGrip phone holder with adjustable side arms to fit nearly any phone.Side arms adjust from 2-1/4" to 3-3/4" widthRubberized indexed grippers with foam-backed cradle won’t scratch your deviceFits round bars from 7/8" up to 1-1/4"Fits oblong bars from 3/4" x 1" up to 7/8" x 1-3/8"Tilt 210º, turn 360º and rotate 360ºQuick-release button for easy phone accessRatcheted feet allow for access to data portsNon-invasive features allow full access to touch screens