A Swivel Clamp is used to connect the parts of a Frame Clamp Assembly.
The Head End has two 1/4" holes, and the Thread End has two threaded holes for
a 1/4" UNC bolt. The standard bolt length provided with a Swivel Clamp is 1".
The longer bolts needed to use the Swivel Clamp with a Frame Clamp Spacer are
supplied with the spacer.