PanaVise 709B Window Grip Deluxe Telescoping Telescoping arm adjusts from 13.25-Inch (336.6mm) to 18-inch (457.2mm) Arm locks firmly into position and is indexed to prevent rotation Aircraft grade aluminum alloy shaft Telescoping arm adjusts from 13.25-Inch (336.6mm) to 18-inch (457.2mm) Arm locks firmly into position and is indexed to prevent rotation Aircraft grade aluminum alloy shaft Arm has 140 degree motion; knob locks arm into place Full range of motion under the electronics: 210 degree Tilt, 360 Turn & 360 Rotation