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OCTO™ Ratcheting Arm with 18" Heavy-Duty Seat Rail Mount with AMPS Mounting Pattern
OCTO™ Ratcheting Arm with 18" Heavy-Duty Seat Rail Mount with AMPS Mounting Pattern
OCTO™ Ratcheting Arm with 18" Heavy-Duty Seat Rail Mount with AMPS Mounting Pattern
OCTO™ Ratcheting Arm with 18" Heavy-Duty Seat Rail Mount with AMPS Mounting Pattern
OCTO™ Ratcheting Arm with 18" Heavy-Duty Seat Rail Mount with AMPS Mounting Pattern
The 18 Gooseneck Seat Rail Mount—compatible with 25mm ball accessories—features a black metal spring, mounting plates, a silver bracket, and four black screws, all displayed on a white background.
Diagram featuring the Slim-Grip® Tablet Holder with Metal Drill Base Mount, illustrating a Universal AMPS plate with four screw holes, central ball mount, labeled dimensions, and text highlighting compatibility and easy installation.
A person holds the Clamp Mounting Pedestal with 12 Gooseneck - Dual-T Compatible, featuring black ribbed grips for a secure hold. The text notes its stability and adjustability for device mounting. Arkon Mounts logo is in the corner.
The 18 Gooseneck Seat Rail Mount—compatible with 25mm ball accessories—features a black metal spring, mounting plates, a silver bracket, and four black screws, all displayed on a white background.
Diagram featuring the Slim-Grip® Tablet Holder with Metal Drill Base Mount, illustrating a Universal AMPS plate with four screw holes, central ball mount, labeled dimensions, and text highlighting compatibility and easy installation.
A person holds the Clamp Mounting Pedestal with 12 Gooseneck - Dual-T Compatible, featuring black ribbed grips for a secure hold. The text notes its stability and adjustability for device mounting. Arkon Mounts logo is in the corner.

OCTO™ Ratcheting Arm with 18" Heavy-Duty Seat Rail Mount with AMPS Mounting Pattern

SKU RMSRA8825MM
Rated 4.87/5 by thousands of happy customers
$0.00 - $0.00
$0.00
$78.95
$78.95 - $78.95
$78.95
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The OCTO™ Ratcheting Arm with 18" Heavy-Duty Seat Rail Mount provides a strong, fully adjustable solution for securely positioning your phone or tablet in cars, trucks, and fleet vehicles. The 18-inch aluminum gooseneck bends easily into place while maintaining a firm hold, and the mount installs directly to your vehicle’s seat rail using the passenger seat bolt—no drilling required. A drill-base option is also included for permanent mounting setups.

At the top of the gooseneck, the OCTO™ Ratcheting Arm delivers smooth, controlled adjustability with 360-degree rotation and multiple pivot points, making it easy to set the perfect viewing angle for navigation, ELD apps, or in-cab workflows. Built from reinforced materials for daily use on the road, this mount is compatible with all 4-hole AMPS holders, cradles, and adapters.

Features

  • Heavy-duty 18-inch aluminum gooseneck for flexible positioning
  • OCTO™ Ratcheting Arm with 360° rotation and multi-point adjustability
  • Solid aluminum seat rail design for long-term durability
  • Smooth 180° left/right adjustment for optimized device placement
  • Quick installation using only a socket wrench—no drilling required

Compatible with any holder or device that utilizes a 4-hole AMPS mounting pattern.

  • Design: Designed with an OCTO™ Ratcheting Arm and 18-inch aluminum gooseneck for precision positioning and durable in-vehicle performance. 
  • Model: RMSRA8825MM
  • Mounting Pattern: 4-Hole AMPS
  • Material: Reinforced Composite
  • Mounting Type: Seat Rail

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