Whitecap Heavy Duty Antenna Mounts Stainless Steel Rachet Mounts #1802 316 stainless steel construction. Lay-down handle quickly loosens the ratchet for fast, easy antenna drop. Features standard 1"-14 male thread mount with a hole for a Loran cable. Lightweight mount may be used self-supporting with an antenna up to 15' long. Both mounts feature two ratchets for both up/down and side-to-side adjustments. Flat base for deck mounting. Base dimensions: 3 " x 2 ".