Calumet Boom Clamp

Has anyone used the Calumet Pivot Clamp by Calumet? I'm not sure which booms it fits since there are not specs.

Large Pivot Clamp for 8-9' Boom - Calumet
http://www.calumetphot​o.com …amp-8-9-boom-calumet.html

siniquezu wrote in post #11252559
Has anyone used the Calumet Pivot Clamp by Calumet? I'm not sure which booms it fits since there are not specs.

Large Pivot Clamp for 8-9' Boom - Calumet
http://www.calumetphot​o.com …amp-8-9-boom-calumet.html

There's something else to consider.

It appears that the clamp (which is similar to but not the same as the Manfrotto boom clamp I use) is designed to fasten to a standard 5/8" stud on the top of an ordinary light stand. It is not wise to attach any boom to the 5/8" stud on most consumer-grade light stands because an unbalanced boom rig can rip the stud right out of most of the stands I have seen.

My boom rig has a 1-1/4" female socket at the top of the heavy steel stand for the pivot assembly to seat in.