RAM 1.5" Track Ball Mount with Plate Adapter for Humminbird Helix 7

Features: RAM Track Ball with 1.5" rubber ball molded to a high strength composite base with rubber friction washer and a stainless steel T-bolt T-bolt is designed for easy installation, adjustment and removal from virtually any track system Simply insert or slide the Track Ball into your track and twist the ball clockwise to tighten in place - Twist counterclockwise to loosen or adjust the ball T-Bolt Dimensions: .48" x .95" - Fits a variety of tracks Standard length double socket arm - Overall arm length: 5.625" A single spring inside the arm opens the end sockets, allowing you to pivot the ball and socket connection 2" x 4" plate with a four hole pattern and 1.5" rubber ball Plate thickness: 1/4" - center to center hole pattern is 1.5" x 3.5" (hole diameter: 1/4") RAM adjustable socket system for your perfect viewing angles Overall length fully extended: 7.5" Hold up to 4 lbs. Constructed of powder coated marine grade aluminum Made in the USA Compatible Devices: Humminbird Helix