Spring loaded holder expands & contracts for perfect fit of your device. Versatility of holder allows for attachment to many RAM-to-RAM ball mounts * Rubber coated tips will hold device firm & stable. Single socket technology allows for multiple adjustment angles & articulation of device * Minimum Width = 0.875" (Devices at 0.875" must be a minimum of 4" in height to fit into holder) * Holder Dimensions: Maximum Width = 3.25". Depth = 0.875" * Material: High Strength Composite, Rubber Tips & Rubber Lined Strap