Spring-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 Device Holder Dimensions: Height Range: 4.75″ – 5.75″, Width Range: 2.19″ – 3.25″, Max Depth: .72″; Clamp Range: .5″ – 1.25″ diameter Made of powder-coated, marine-grade aluminum and high-strength composite for durability and reliability in the most demanding environments Backed by a lifetime warranty Style:Small Phones This version of the spring-loaded RAM holder provides a secure fit for a variety of regular size 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. Included is a short RAM double socket arm and zinc-coated handlebar U-Bolt base that accommodates rails from .5 to 1.25 in diameter.