The RAM-B-176-GDS-DOCK-V1U consists of a fork stem base, double socket arm, diamand adapter base and the RAM® Universal Vehicle Phone Dock with GDS® Technology. The vehicle dock is a spring loaded, quick release cradle that offers a secure fit with easy access to the mounted phone or phablet; compatible with any phone or phablet wrapped in IntelliSkin®. This one of the cleanest ways to mount small electronics on your motorcycle. Simply slide the assembly into the hole of the stem and tighten the machine screw to create a tight fit. This part is designed to fit into the cylindrical bore wall of fork stems and will work with stems that measure from 12 - 33mm (.5” – 1.29”).