O-Z/Gedney CTC conduit cable tray clamps are used for connecting and grounding rigid conduit, IMC, or EMT to cable trays. They secure and bond metal conduit (rigid steel or aluminum, IMC and EMT) to the side rails of steel or aluminum cable trays without drilling or welding the tray. The 1-1/2 in through 4 in sizes are designed so conduit can attach to the tray from any angle up to 120 deg, allowing large power or control cables to be routed easily.