- Small Phone X-Grip holder - For phones 1.875" (47.6mm) to 3.25" (82.6mm) wide and max .875" (22.2mm) deep - Small X-Grip phone mount - Medium-sized socket arm 3" (76mm) ball to ball - ''U-bolt'' base that will clamp to 1/2" (12.7mm) to 1.25" (31.8mm) diameter aquare tubing and rails - Holds max. 2 lbs / 907 gram normal use or 1 lbs (454 gram) heavy duty use - Includes: (1) Optional Tether; (1) Glue Tube for Rubber Caps; (1) 1/4"-20 U-Bolt for 0.5" - 1" Rails; (1) 1/4"-20 U-Bolt for 1" - 1.25" Rails; (2) 1/4"-20 Nylock Nuts; (2) Rubber Caps; (1) U-Bolt Spacer - Materials used: Marine-grade aluminum; high strength composite; stainless steel. Consists of a zinc coated u-bolt base; double socket arm and universal X-Grip cradle. Included in this package is hardware that will accommodate rails from 0.50" to 1.25" in diameter. The base includes black cover caps to be placed over the exposed ends of the u-bolt. The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles. The included composite rail adapter can narrow the rail to a minimum width of 0.5". The included X-Grip cradle has a clean and clever four leg design that sports great holding power without hiding your phone behind foam pads and plastic. The spring loaded X-Grip cradle expands and contracts; allowing for a perfect custom fit of your cell phone.