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Original price $9.95 - Original price $9.95
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$9.95 - $9.95
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Original price $9.95 - Original price $9.95
Original price
$9.95 - $9.95
Current price

The Robust™ Series 3.75" Composite Mount Shaft, part of Arkon's Robust™ Mount Series, is designed for 25mm (1") compatible mount bases and adapters. This allows you to create your own personalized mount solution. This package includes only the Mount Shaft with a tightening knob (holders and adapters sold separately). Measuring 3.75" tall, this mount shaft provides ultimate flexibility with adjustment points at both ends, making it perfect for designing a versatile and reliable mounting solution. Optimize your setup with the SP-RM250 Mount Shaft for a durable and customizable mounting experience.


  • 3.75" shaft design for Arkon applications
  • Designed to create custom and personalized Arkon setups
  • Heavy-duty reinforced composite construction is durable and tough
  • Works with Arkon 25mm ball-compatible adapter mounts and applications
  • Tightening knob for securing the 3.75" shaft once in place

Arkon Custom Setup

Create your ideal custom mount setup with the Robust™ Series 3.75" Composite Mount Shaft. Start by selecting your preferred mounting solution, such as a 4-hole AMPS drill base, clamp, or other options, and then choose your holder type, like a lockable metal tablet holder or a simple phone mount. This flexibility allows you to design and modify the perfect mounting solution tailored to your needs. Designed to handle demanding environments, the Robust™ composite mount shaft is perfect for enhancing your setup with long-lasting strength and stability.

Durable Robust™ Mount Shaft

The Robust™ 3.75" reinforced composite mount shaft is known for its hardwearing properties and toughness, making it ideal for any mounting application. Whether you need to extend the arms on your forklift mounts or upgrade the tablet holder shaft arm in your car or truck for GPS navigation, this mount shaft ensures reliable performance. 

Use Arkon's adapters to create a 4-Hole AMPS (Model APAMPS25MM) or suction mount (Models SPRM079 or SPRM080) base, and select from various mounting pattern heads including Dual-T (Model APRM2T), 4-Prong (Model SP25MM4P), 1/4"-20 camera (Model SP142025MM), lateral GoPro (Model SP25MMGP), VESA pattern (Model AP25MMVESA), or 4-Hole AMPS (Model APAMPS25MM).

Compatible with:

Compatible with any device, shaft, or holder that utilizes a 25mm / 1 inch ball size.

  • Design: 3.75" Mount Shaft with 25mm ball compatible ends for creating, upgrading, and creating custom mount solutions
  • Model: SP-RM250
  • Materials: Reinforced composite
  • Arm Length: 3.75"