Check the listing for details. RAM Composite Yoke Clamp Mount with Diamond Base - RAP-B-121-238U. Condition: New, Made in United States. Listed at 40.99 USD. Features: ---Clamp fits rails from 0.625" to a maximum of 1.25" in diameter - also fits flat edge or square posts up to 1.25" ---Strong, light weight simple to use - holds firm to most glare shields, yokes, or tubing ---Molded to the clamp is a 1" rubber ball with option to add a second 1" ball (sold separately) ---Standard size (medium) double socket arm: Overall Length: 3.73": Socket-To-Socket Length: 3" ---Diamond base with 1" ball - connects to many RAM and third party cradles with a two hole AMPS pattern ---Constructed of high strength composite ---Includes flat clamp adapter ---Holds up to 2 lbs. ---Made in the USA Brand: RAM Mounts Part number: RAP-B-121-238U Warranty: Manufacturer's lifetime warranty.