RAM® Double U-Bolt Ball Base for .75" - 1" Rails (RAM-235-2U)
RAM Double U-Bolt Ball Base for 1.25" - 1.5" Rail (RAM-235-1U)
RAM Rail Base with Steel U-Bolt & 1.5" Ball (RAM-231U)
RAM 1.5" Ball Rail Mount with U-Bolt & AMPs Pattern (RAM-101U-CA1)