PanaVise Universal Phone Holder w/AMPS Adapter Spring-loaded arms gently, yet securely, hold your devices. Adjustable arms accommodate devices 1.75" to 4.25" in width Neoprene rubber pads help protect the back of the chosen device. Includes the PanaVise T-Slot adapter. The T-Slot adapter attaches easily to any AMPS compatible mount using the included hardware.