SummaryIt is a rack that you can use to hold air tools. It is sized to use industrial quick-connect fittings. There is a step in the bore to accommodate for the fittings change in diameter and I modeled it so there is +.02" clearance on diameter to compensate for the polygons the slicers create in holes. My tools fit with only a few thousandths of clearance on the printed part; perfect. Mounts to a wall stud with clearance for two #10 wood screws. It should be able to hold anything from a blow gun to an impact. It is 6" wide with holes for 4 tools.InstructionsPrinted with 25% infill and it feels very stout. I don't know if it will handle 4-impact guns (if you can fit them on here) but it is strong enough for a tire gauge and the couple of different blow guns that I will be using it for.