Invisibly mount wall panels, cabinets, mirrors, picture frames, bed headboard, or anything else to a vertical surface ! Installation Tips - Each set has about 1/16" of lateral play. This makes them fairly forgiving, but try to be as precise as possible when laying things out. - Attach to wall first. The hole spacing is 8/ 5", so be sure to find the exact center of the stud and put the 1-3/4" screws in at a slight angle to ensure it get a good bite into the wood. - Measure out and secure clips to the object you're hanging, just using two 3/4” screws in each clip at first. - Hang the object. If no tweaks needed, install the remaining screws. - The clips have a finished thickness of 1/ 5". That's fine for most applications, but if you're handy in the workshop and are able to route a recess in the back of the wood item you want to hang, a completely flush look can be achieved. Specifcation 1 Set include: 2- Z Clips (Large), 4- short screws, 4- long screws. You get: 2 sets Z-Clip: Cold rolled stainless steel Dimension - 54mm x 30mm Thickness - 2mm Hole diameter - 5mm Hole spacing - 40mm Short screw: Steel cross sink screw Diameter - 4mm Length - 20mm Long screw: Steel cross sink screw Diameter - 4mm Length - 45mm