The GT1 model encircles your fingers completely for a comfortable fit. It is highly recommended to use the grip with a basic silicon case to ensure a strong hold. You can also purchase small rubber bands to help hold the device in place (not included).

More information is available at https://gripatech.com/ Assembly video: https://youtu.be/fU-zGeis-mA

Grip Sizing: H20: Finger holes: two 20mm and one 19mm finger hole. For a loose fit, the H21 is recommended. T080: Large Phone: fits devices 144–166mm tall