Armor-X ONE-LOCK mount with Type-M for mobile phone ONE-LOCK mount is a fully articulated arm with 90 pivotable and 360 rotatable ends, and an elbow that rotates 360. The lever tightens and locks for precise positioning. The mount comes with a Clamp Base which can fit max 55mm / 2" tube. It comes with patent pending X-mount magnetic-align interface for secure and easy installation.