Shakespeare Style 4720 Economy Rail Antenna MountShakespeare&';s Style 4720 Economy Rail Mount is designed for quick and easy installation on vertical or horizontal, straight or angled rails. Its simple design makes installation a snap. The vice section grips the rail, and the flat section supports the antenna. The flat section can also be bolted to a flat surface, instead of to the rail grip. Standard 1" - 14 thread Nylon adapters included for 7/8", 1", and 1-1/4" vertical or horizontal rails Stainless steel construction Specifications: Type: Mounting Brackets Box Dimensions: 2"H x 5"W x 6"L WT: 0.4 lbs UPC: 719441110680