The Taco Striker skiff flush mount base is one of the strongest gunnel mount bases on the market today and features a unique locking mechanism. These ambidextrous arms will fit both port and starboard bases and feature 12 locking positions. Constructed from stainless steel. The arms are removable for unobstructed decks. The SO212 will fit the 1-1/8" diameter outrigger pole and has a base plate measuring 5-1/8"L x 2-5/8"W. The SO215 is designed for the 1-1/2" diameter outrigger poles with a base size of 6"L x 4"W. Sold as a pair. Welded locking adapter | Taco 1 1/2" Gunnel Flush Mount Bases