You Are looking at a R&M RBC-1000 beam clamp. It has a 1 ton capacity . R&M has been and continues to be a leader in the material handling industry.
 
 
 
BC - Beam Clamp

KEY TECHNICAL DATA: Versatile jaws designed to mount on a range of tapered or flat beams. Designed to minimize stress applied to beam. Built-in suspension bar provides low headroom. Easily installed and adjusted by hand. Provides temporary or permanent mounting point for hook mounted hoists or lever pullers. Fits from 3-9" beam flanges.
 
 
 
If you don't see what you want feel free to give us a call 800-509-6131. We carry the full line of R&M products. We also service what we sell. Give us a call for your R&M Parts needs.