Package Includes: The fish finder mount consists of a 1.5" ball diameter bar clamp base, a 9.1" long double socket arm and a 6.25" x 2" marine electronic rectangle plate. Securely holds 7"/9"/10"/12" electronic devices. Features ball and socket design for a secure grip and 360° adjustable rotation Sturdy & Durable: The bar clamp base & rectangle plate are made of 6061-T6 aluminum alloy material with CNC machining and iii grade hard anodized surface. The 1.5" ball long double socket arm is made of powder-coated, 6061-T6 aluminum alloy for durability and reliability in the most hardest marine environments Anti-slip Rubber Ring Insert: The bar clamp base includes a 1.5" TPU ball and equips with four soft rubber ring inserts that provide a snug fit and protect the mounting surface.The bar clamp base fits for 1.5"(38.1 mm) / 1.75"(44.45 mm) / 1.85"(46.99 mm) / 2"(50.8 mm) / 2.1"(53.34 mm) diameter round rails. An allen key is included in the package for your convenience to install Wide Application: The rectangular plate includes a C size 1.5" TPU ball and contains a variety of pre-drilled holes that are compatible with several marine electronic devices, including fish finder, GPS chartplotters, depth finders, CB radios, ham radios, gimbal brackets and more Compatible with Garmin fish finders and GPS chartplotters: ECHOMAP Plus 72cv 73cv, 74cv, 75cv 77cv; GPSMAP 722, 722xs, 742, 742xs; Striker Plus 5cv, 7cv, 7sv, and other fish finders and GPS chartplotters Compatible with Lowrance fish finders and GPS chartplotters: HDS Carbon 7, HDS LIVE 7, Hook Reveal 7 Series, Hook Reveal 9 Serie, and other fish finders and GPS chartplotters Partial Compatibility: Compatible with Humminbird & Raymarine Partial Fish Finders, GPS Chartplotters. (Please Note: Not compatible with the Humminbird Helix 5, Helix 7, Helix 9, Helix 10, Helix 12, Helix 15 and Solix 10) Please Note: Before purchasing, please measure the diameter of your round rail to ensure the bar clamp base will fit your rail Note: The package does not include installation screws and other hardware The fish finder mount consists of a 1.5" diameter bar clamp base, a 9.1" long double socket arm and a 6.25" x 2" marine electronic rectangle plate.