12 gauge strut channel with holes PS 200 H3 has round holes on three sides of the channel, sized for use with 1/2" threaded rod and fasteners. These holes can eliminate the need for field drilling when installing a trapeze support, anchoring the channel to a surface, or for many other applications. This channel is commonly used for trapeze supports, seismic bracing, and anchoring to floors, ceilings and walls. This is a great product for certain seismic bracing applications where slots are not allowed. This product also works well with our P9200 Telestrut for telescoping applications, such as solar racking, adjustable signage, and adjustable drop supports.