RAM® Composite Double Socket Swivel Arm Patented
Double Socket Swivel Arm for 1" Ball, Plastic  

The swivel action is very nice.  There are times when a standard RAP-B-201U arm can't be positioned as desired because the "leg" attached to the ball can only go to one or the other side of the arm.  This swivel arm has a joint in the center that allows the 2 ends to be set to multiple positions.  Don't think that it is not strong because it is made of plastic - it is very rugged.  The arm has a socket at either end to allow a 1" diameter ball (size "B") accessories to be connected. A tightening screw on on each end of the arm enables the sockets to clamp firmly on a 1" diameter ball.  The assembly includes 2 RAP-B-200-1U arms attached to a RAP-280U "double octagon button". 

Length (center of socket to center of socket): 3.5 inches (89 mm)
Length with 2 x RAM-B-238U bases: 5.5 inch (140 mm)
Length with 2 x RAP-B-238U bases: 5.9 inches (150 mm)
Weight: 4.7 oz (133 g)

FEATURES:

• Double socket swivel arm features 360-degree center rotation with an overall length of 3.69" and a socket-to-socket length of 3.5"
• Attaches to any B size RAM® ball component, including mounting bases and device holders
• Double ball and socket technology allows for near-infinite adjustability of your RAM® mounting system
• Backed by a lifetime warranty

SPECS:

Product dimensions:
Overall Length: 4.22"

Socket to Socket Length:
3.6"

Ball Size:
B Size (1")

Weight Capacity:
Standard Use: 2 lbs
Heavy-Duty Use: 1 lb

Materials: 
High strength composite

Weight:
0.3 lb

Q&A

Q: Looks like it's not a real 360degree adjustment! Only a few positions can be locked in?
A: The two sockets of the RAP-B-200-12U can rotate 360 degrees independently of one another on the center axis then will be locked in place once you tighten the corresponding tightening knobs.

Q: When the Socket ends are tightened, does the Swivel also get locked?
A: Yes, when the sockets are tightened the arm can not swivel.