The X-Lock phone mount is designed to hold the newest and largest phones and cases in your vehicle...without compromise. The X-Lock can expand and hold all four corners of the device securely and easily with the oneclick mechanism. The Heavy Duty extend based has a larger diameter Temberbond suction cup engineered to handle the weight of your biggest phones. The Extend base has 360 degree rotation, which means it can easily be adjusted without removing the suction cup. Simply release the locking lever, and swing the extended arm to the desired position in your vehicle. The 12" extend is super useful for commercial vehicles with larger dash boards. The TexGrip head will lock onto your device for the most secure grip you can get.