RAM Mounts RAM-B-138-PD4U Quick-Grip XL Phone Mount with Screw-Down Base

The RAM-B-138-PD4U Quick-Grip XL with Screw Base combines RAM’s rugged spring-loaded XL device holder with a medium-length double socket arm and 2.5″ round drill-down base. It provides a secure, permanent mounting solution for larger phones and compatible devices in vehicles, boats, machinery and other demanding applications.

The adjustable side keepers allow the Quick-Grip XL to securely hold a range of larger phones, GPS units and other compatible devices, while the RAM B-Size ball-and-socket system provides excellent adjustability and helps dampen shock and vibration.

Browse our full range of RAM Mounts vehicle mounting systems →

Why Choose the RAM-B-138-PD4U Quick-Grip XL with Screw Base?

• Spring-loaded Quick-Grip XL holder securely grips a wide range of large phones and compatible devices.
• 2.5″ round screw-down base provides a strong, permanent mounting point.
• Universal AMPS hole pattern for versatile installation.
• Medium double socket arm and RAM ball-and-socket system provide near-infinite angle adjustment.
• Rubber ball system helps dampen shock and vibration in vehicles and machinery.
• Adjustable side keepers allow compatibility with selected GPS units and other devices within the supported dimensions.
• Durable construction designed for demanding vehicle, marine and outdoor applications.
• Lifetime warranty backs quality and reliability.

Learn more about the RAM® warranty policy here.

Specifications

Holder dimensions: Height 5.75″–7.25″ (146–184 mm), Width 2.625″–3.625″ (67–92 mm), Max Depth 0.72″ (18 mm)
Base diameter: 2.5″ (63.5 mm)
Base hole pattern: Universal AMPS
Ball size: B-Size (1″ / 25 mm)
Arm length: Medium double socket arm
Mounting type: Screw-down / drill-down
Materials: Marine-grade aluminium and high-strength composite

What’s Included

• Quick-Grip XL spring-loaded phone and device holder
• Medium RAM double socket arm (B-Size)
• 2.5″ round drill-down ball base with universal AMPS hole pattern

Ideal For

Perfect for pest control operators, hunters, farmers, tradespeople and outdoor users who need a secure, permanently mounted phone or device holder in a vehicle, UTV, boat or piece of machinery. Ideal for navigation, mapping, tracking apps, communications and keeping your device securely positioned while travelling or working in the field.

Additional Compatibility Info

Compatible with phones, GPS units and other devices that fit within the listed holder dimensions. Always check your device dimensions, including any protective case, before ordering.