The RAM-B-189B-C-UN9-225B consists of a double 3.25" twist lock suction cup base, LONG double socket arm, round base adapter and universal X-Grip® cradle for 10" tablets. The double suction cup base is designed to have an "EXTRA STRONG" hold on glass and non-porous plastic surfaces. Included with this mount is an optional steel backing plate to reinforce any hard surface that this may drill up against, instead of the suction cup feature. The X-Grip® cradle is compatible with devices that will fit the dimensions listed below. It is important to verify the dimensions of your handheld device with a case/sleeve/skin when determining the overall size.