A standard 8" C-Clamp. Many common uses include holding wooden structures together or securing a high-hat to the top of a ladder.
Manufacturer: Matthews Studio Equipment
Model Number: C-Clamp
Website (Commercial/Pro): Matthews Studio Equipment Commercial Website
Product ID: MP12349
R2 Description: Grip Gear, 8in C-Clamp with Junior Receiver
MPR Says: "Ye-old clamp"
"Nothing special here- its you everyday, run of the mill c-clamp. Sometimes thats all you need!"