Bridgeport 953-S 2 IN Steel Beam Clamp, Box of 50
https://nsiindustries.us.com/product/bridgeport-953-s-2-in-steel-beam-clamp-box-of-50/
Bridgeport Beam Clamps make quick connections to structural steel without the need for drilling or welding. Single screw clamps with two threaded holes can be used for a variety of support, lifting and rigging applications.