RAM Mount RAM Quick-Grip XL Spring-Loaded Phone Mount w/Drill-Down Base [RAM-B-138-PD4U]RAM Quick Grip XL Spring Loaded Phone Mount with Drill Down Base This version of the spring loaded RAM Quick Grip holder provides a secure fit for various large phones and other devices. The adjustable side keepers ensure that devices like GPS units and Bluetooth speakers within the listed compatible dimensions will also fit in the holder. A medium length RAM double socket arm and a 2. 5 drill down round ball base featuring the universal AMPS hole