RAM® 4" Square Post Clamp Mount with Round AMPS Plate - C Size 5.725" If you do not allready

If you do not allready have the necessary knobs it would be best to purchase The RAM-114DTMU instead

Compatible with 7/8" - 1" round rails

5" diameter round bases that contain the universal AMPS hole pattern

The RAM antenna mount will work with any standard antenna that has a 1" -14 threaded interface

thus allowing for almost infinite adjustment and perfect viewing angles

RAM® 4" Square Post Clamp Mount with Round AMPS Plate - C Size 5.725" If you do not allreadyThe RAM 101U 247 4 consists of a double socket arm, 2. 5" diameter round base with the universal AMPS hole pattern and 4" clamp base. The clamp base will wrap around a square post with a maximum width of 4" and is tightened by screwing the two plates together with the included nuts and bolts. Rubber ball, socket technology dampens shock and vibration, as well as allows for almost infinite adjustment, perfect viewing angles.