The Outrigger Pad end has two holes 1.912" from center to center. This will nnect to the RAM-B-238 Outrigger Pads Series, to the unitemporaryl industry standard AMPS hole pattern or directly to the back of the RAM Plastic HOL Cradles. This adhesive base DOES NOT have a RAM 1" rubber nnection ball. Hardware Included. (1) 2.5" Double Adhesive Pad.