Quick-Sling Flush Mount Swivel HangerQuick-Sling’s QSWI3000 mounts parallel to one joist or perpendicular across two. Slots allow 16 inch or 24 inch on center mounting. Unit rotates 360 degrees and then locks in your desired position. Can hold up to 200 pounds. The square steel tubing cuts down on vibration while three hitch-pins add to the safety and sturdiness.