RAM Double Ball Adapter - B Size
Not a device holder - a small connector that joins two B-size RAM arms into one longer mount, or lets you branch a second accessory off the same base.
This page is worth reading carefully before ordering: unlike the other products in our RAM range, this is not a phone or tablet cradle. It is a small aluminum post with a 1" B-size ball on each end - a building block used to extend or branch an existing RAM mount, not to hold a device by itself.
Two situations call for it. First, extension: if a single double socket arm doesn't reach far enough or angle correctly between your mounting point and your device, this adapter lets you connect a second arm in line for extra length and an additional pivot point. Second, branching: screwed into a base that already has a socket, it gives you a second, independent ball connection point - useful for running a second accessory, such as a camera or a light, off the same base as your main device.
One honest trade-off worth knowing about: RAM's own guidance is that every extra arm or adjustment point you add to a mount reduces overall stability. A longer chain of arms is more prone to sway and vibration than a short, direct one. Use this adapter when you genuinely need the extra reach or the branch point, not as a default way to build every mount.
Features
- Two B-size (1") RAM rubber balls joined by a short post, measuring 1.75" socket-to-socket
- Connects two B-size double socket arms for extra extension or an extra articulation point
- Post is made of powder-coated, marine-grade aluminum for durability outdoors
- Backed by RAM's lifetime warranty
How RAM's modular system works
Every RAM mount is normally built from up to three parts that click together: a base that clamps, bolts, or straps onto the vehicle; an arm that connects two RAM balls and locks at any angle by hand, so a device can be tilted, rotated, and repositioned freely; and a cradle that grips the specific device. This adapter is a fourth kind of part - a pure connector with no base and no cradle function of its own - that lets you insert an extra joint anywhere in that chain.
The balls on this adapter are B Size (1") - RAM's most common size, standard duty, and what RAM recommends for phones, GPS units, and light tablets in normal use. Only pair it with other B-size arms and bases; it will not connect directly to C-size components, which are used for heavier devices such as large tablets or handheld computers in higher-vibration mounts.
As with the rest of the system, everything connected through this adapter is tightened entirely by hand - no tools or torque spec involved. That is also why RAM's stability guidance matters here more than on a simple single-arm mount: every additional hand-tightened joint in the chain is one more point that can loosen under vibration if it is not snugged down properly.
Specifications
| What it is | A connector, not a device holder - joins two B-size double socket arms |
| Overall length | 2.54" (6.5 cm) |
| Socket-to-socket length | 1.75" (4.4 cm) |
| Ball size | B Size (1") on both ends |
| Weight capacity | Standard use: 0.9 kg (2 lb). Heavy-duty use: 0.45 kg (1 lb) |
| Materials | Marine-grade aluminum |
| Weight | 0.04 kg (0.09 lb) |
| Warranty | Lifetime |
Frequently Asked Questions
Is this a tablet or phone holder?
No. It's a small connector with a ball on each end, used to join two B-size arms together or to add a second connection point off an existing base. You still need a separate cradle, such as our RAM Quick-Grip XL, to actually hold a device.
Will using this reduce how stable my mount is?
Yes, somewhat - RAM's own guidance is that adding length or an extra adjustment point to a mount always trades away some stability compared to a shorter, more direct setup. It's the right tool when you genuinely need the extra reach or a branch point, not as a default way to build a mount.
Can I connect it to a C-size arm?
No - both balls on this adapter are B Size (1"). It only connects to other B-size double socket arms and bases. RAM sells the same style of adapter in C, D, and mixed B-to-C sizes if you need a different combination.
What's a real example of when I'd use this?
Two common cases: extending a single arm that doesn't quite reach or angle correctly between your dash mount and your phone holder, or branching a second, independent accessory - a small camera or work light, for example - off the same base your phone holder is already using.
Does it come with the arms and base, or just the adapter itself?
Just the adapter - the small aluminum post with a ball on each end. The double socket arms it connects, and the base at the other end of the chain, are sold separately.