Shakespeare Antenna Swivel Mount Kit The Shakespeare Antenna Swivel Mount Kit consists of Shakespeares swivel mount and a molded upper bracket. The bracket features an insert to accept 1 or 1-12 diameter antennas or extension masts. The dual swivel mount permits mounting on vertical or horizontal surfaces. Features Swivel mount is stainless steel construction Includes a 1-18 insert Standard 1-14 thread male California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Deta