The spring-loaded RAM® Quick-Grip™ with Low-Profile RAM® Tough-Claw™ (RAM-HOL-PD4-400-1U) consists of the small RAM® Tough-Claw™ base and large RAM® Quick-Grip™ phone holder, connected by the RAM® Pin-Lock™ adapter. The adjustable side arms ensure that your phone will remain secured in the holder without blocking any ports or buttons. With the RAM® Tough-Claw™ base connected, easily attach the Quick-Grip™ on round, square, and odd-shaped rails and bars ranging from .625" to 1.14" in outer diameter. This kit is compatible with handheld devices that will fit the dimensions listed below. It is important to verify the dimensions of your handheld device with its case, sleeve, or skin when determining the overall size.