The RAM combination handlebar and brake/clutch reservoir base provides the ultimate flexibility for mounting to your motorcycle. Mount to either your handlebar or brake/clutch, almost infinite adjustment and perfect viewing angles are provided by this kit Hardware: Standard or metric thread stainless steel bolts, provided in the kit. The zinc coated metal u-bolt accommodates rails in diameter from 0.50" to 1.25" in diameter. Material: Powder Coated Marine Grade Aluminium Ball Size: 1" Rubber Ball "B" Size TIP: Use this mount base on a Honda Pan European ST 1100 or 1300 on the Clutch or Brake Clamp.