Steel City® Strut Clamp (Universal Strut Strap), 1-1/4 in, Zinc Plated Steel, Pre-Assembled with Bolt and Nut, For Use With EMT, IMC, and GRC (Rigid) Conduit, Compatible With 1-5/8 in x 1-5/8 in Strut Channel (Unistrut/Kindorf). Secures conduit to strut channel in suspended systems and rack installations.