Suitable: For 18-30mm thickness and tablet width between 150-200mm Usage: For installation directly into woodworking or masonry Hardened Steel: Made to last a lifetime, we recommend mounting it to a stud on your wall for maximum support. Each rack holds 60 kg. For heavier shelves, please add additional brackets to distribute the weight. Easy Installation: Drill a 10mm hole in your shelf to a depth of 8cm, fix the bracket to the wall, slide the shelf onto the bracket.Fully Concealable: Use a router to remove 8cm from the wood. Made to completely hide behind your shelf, small profile for easy concealment. Feature: Concealed mount, floating shelves (invisible brackets). You will need screws to attach the bracket (screws are not included) Angle adjustment via the pin that presses on the back plate. Made of metal in silver tone, widely used in home and offices. Easy installation. These shelf brackets are made of strong, sturdy steel and finished with an iron-nickel plating for ultimate strength and longevityHOW TO USE STORE SHELF BRACKETS:STEP 1: Place your first bracket against the wall, using a spirit level to make sure it's level. Mark the mounting hole positions with a pencil.STEP 2: Using the pencil marks, punch holes in the wall. Always choose screws or fittings suitable for the material of your wall. Screw the bracket in place.STEP 3: Slide the shelf on the bracket to check that it is level (use the spirit level to make sure). Once you are happy with the position of this shelf and how it looks, slide it out of the bracket so you can position the rest of the brackets. STEP 4: Once all the brackets are in place, slide the shelves out and secure them in place using the small screws supplied with the shelf, using the pre-drilled holes on the underside of each shelf. Specification: Hardware : Cold Rolled Steel Color: SilverSize: 75mm (3")Timber size:Width:between 8-20cmThickness:18-30mmMaximum load:300KG(Depending on the load capacity of the wall and the quality of the screws. This product is not broken)Content:6pcs x Invisible Wall Shelf Bracket Note: The data are all manual measurement, please allow 1-3cm error, due to the difference in light and display, there will be some color difference, depending on the physical item received.