RAM X-Grip iPhone 6 4.7" Holder with Double Socket Arm & Universal Composite Clamp Mount RAP-B-121-UN7U (sku 20362)RAM X Grip iPhone 6 4. 7 Holder with Double Socket Arm and Universal Composite Clamp Mount. RAP B 121 UN7U The X Grip is a spring loaded holder which allows for a perfect fit to the phone. Rubber coated tips will hold the device firm and stable. Constructed from high strength composite and stainless steel. Holder Dimensions: Minimum width 47. 6mm Maximum width 82. 5mm Depth 22. 2mm. The Clamp Base is designed to hold firm to most glare shields, yokes