WORKS WITH ALL INDUSTRY STANDARD 1-INCH MOUNTS: Commonly used as an additional holding option for with IBBZ-33921 or IBBZ-33791 and other industry standard 25mm / 1 inch dual ball mounts / arms. COMPATIBILITY: Works with all Smartphones, Midsize tablets (up to 7-8 inch tablets), and gaming devices ranging from 2.75 inches to 5 inches wide. Some examples of these devices are: Smartphones- Apple iPhone XS Max, iPhone XS, iPhone XR, iPhone X, iPhone 8 and 8 Plus, iPhone 7 and 7 Plus, Samsung Galaxy S9, S8, Galaxy Note 9, Note 8 Tablets HEAVY DUTY: The rugged device holder has a strong string loaded grip designed for commercial environments. The iBOLT Roadvise XL Holder is perfect as an optional holder for Commercial vehicles. Rotates 360 degrees for optimal viewing positions. KIT INCLUDES: This mounting kit includes: Roadvise XL Holder, 17mm to 25mm (1-inch) ball adapter, and tightening ring. Compatible with 1 inch / 25 mm / B size mounts. U.S. Pat. No. 6,585,212