Features: ---2.25" x 2" plate with 1" ball, a four hole pattern - center to center hole pattern is 1.5" x 2" (hole diameter: 3/16") ---Plate thickness: 1/4" ---Double socket short arm - Overall Length: 2.38"; Socket-To-Socket Length: 2" ---Round 2.5" diameter base with 1" ball and pre-drilled holes, including the universal AMPS ---Constructed of powder coated marine grade aluminum ---Genuine RAM Mount: Part # RAM-B-101U-A-225U ---Manufacturer's lifetime warranty ---Made in the USA.