One-piece, heavy-duty construction ready to install right out of the box, no need to break apart and reassemble, no screws or bolts to drop.Heavy-duty 5/16 in. hex bolt with multi-driver head, Robertson square, Phillips cross-recess and slot, provides a full range of installation options.Reconfigure wiring without complete disassembly. Remove cables easily without disturbing neighboring clamps.Parallel hook design keeps conduits and cable square with strut.Works with all depths of strut - 13/16 in. to 3 1/4 in.