The Smartphone Clip for Tripod from Dot Line features a spring-loaded mouth that opens to 3-3/8' in order to to safely grip most smartphones. A non-skid pad inside of the clip's mouth protects your smartphone against scratches or scuffs while ensuring a strong hold so it can be attached to a tripod. On the backside of the unit is an industry-standard 1/4'-20 tripod mount.