This is a great RAM mount product that will let you mount electronic products by gripping onto the edges of flat surfaces, square bars, etc. It is a very versatile product, and will connect to any of the RAM socket arms for 1" balls. 

Clamping Dimensions:
1. Flat surfaces and square bars/rails from 0" to 1.75" thick (0cm to 4.44cm)
2. Round rails from 0.75" to 1.125" in diameter (1.91cm to 2.85cm)

Features:

• High strength glass filled nylon construction with corrosion resistant stainless steel hardware
• Swiveling jaw-end pads provide stable, even gripping and protection of mounting surface
• Clamp jaw is configured for round, flat and odd shapes
• 1" rubber ball is compatible with numerous RAM arms and mounts
• Small, sleek form factor that accommodates for small, tight spaces
• Built-in lanyard holes
• Quick engage and release of clamp
• Lifetime Warranty!
• Made in U.S.A.
• Material: High Strength Composite
• Ball Size: 1" Rubber Ball "B" Size

Note: The "U" in the part number reflects product packaged in poly bag.

We also sell the RAP-B-397BU :: RAM 1" Ball For Tough Clamp which is an extra ball for the Tough Clamp.