The iStabilizer Clamp is a stainless steel clamp that has 2 male and 1 female 1/4"-20 threads. It comes included in the tabArm bundle but can be purchased separately here. You can use this clamp for any standard photography equipment that uses the 1/4"-20 thread or you can use it with any iStabilizer product as well. This is the clamp only.
The clamp expands to 1.5" wide.