Marine

1.5" Ball Double-Socket Aluminum Arm — 9.1" Heavy-Duty Extension

4.6 9 reviews 1 min read

1.5" Ball Double-Socket Aluminum Arm — 9.1" Heavy-Duty Extension

Product description

What’s included: one 1.5" ball double-socket extension arm (single unit).

Materials & dimensions: This long arm measures 9.1 inches (approximately 230 mm) overall and uses the standard 1.5" (38.1 mm) ball size. It is CNC-machined from solid aircraft-grade aluminum alloy and finished with a powder coating to increase resistance to saltwater corrosion and general wear.

Load & movement: The C-size double-socket arm supports substantial loads — rated for up to about 15.5 lbs when stationary and around 4.5 lbs while in motion — and permits 360° rotation at the ball joints for flexible positioning.

Compatibility & uses: Designed to mate with C-size 1.5" ball mounting bases, it works with RAM-style components and other 1.5" ball device holders. Typical uses include mounting fish finders, chartplotters, GPS units, tablets, depth finders and other marine or vehicle electronics. The ball-and-socket design allows quick, precise angle adjustments and secure clamping once tightened.

Pros

  • Aircraft-grade aluminum construction
  • 360° adjustment with strong clamping
  • Works with C-size 1.5" ball systems

Cons

  • May arrive slightly off the listed length
  • Relatively heavy for small devices
  • Ships as the arm only (no extra hardware)

VerdictA robust aluminum 1.5" ball double-socket arm offering long reach, full rotation and reliable clamping for marine and vehicle electronics. Durable construction and broad compatibility make it a practical mounting solution for demanding environments.

Reviews

  1. I4Y 5/5

    Good reach for a tablet

    Using it with an iPad mini — gives me the extra reach and positioning I needed.

  2. Kevin n Lange 5/5

    Solid quality for an off-brand

    Sturdy build for a non-name product. I fitted it to my 1.5" Starstink and it has stayed put without any movement.

  3. larry folstad 5/5

    Handy screen mount

    Works great as a screen holder.

  4. Andrea Draheim 5/5

    Well made and rugged

    Heavy, durable feel. Swapped it in to hold my depth finder and it’s far stronger than the original part.

  5. D. Rogers 5/5

    Good finish and function

    Nice surface and solid operation. Everything works as intended.

  6. JollyRogers92 5/5

    Very heavy-duty

    Heavy duty.

  7. Matt Myers 5/5

    Reliable in harsh conditions

    Exceeded expectations on my tractor for an Ag Leader monitor. It stayed rock-steady over rough ground with no movement.

  8. Pankaj Dargan 2/5

    Length differs from listing

    Sockets are well made, but the delivered arm length didn’t match the 9.1" stated in the description.

  9. Jose P. 4/5

    Extends reach and holds up

    Mounted this arm to my kayak for a fish finder. The 9.1" length gives plenty of reach and the aluminum feels very solid. It tightened down and didn’t slip even in rough water, and it handled my GPS/sonar without sagging. Corrosion resistance seems effective so far.

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