RAM MOUNT Quick-Grip Phone Holder with short armSpring loaded holder features adjustable side supports that provide a secure fit for a variety of phones and other devices; easily insert and remove your phone with one hand Includes U bolt base that accommodates rails from . 5" to 1. 25" in diameter and a short length, B size RAM double socket arm; ball and socket technology allows for near infinite adjustability Made of powder coated, marine grade aluminum and high strength composite for durability