uxcell Invisible Floating Shelf Brackets 4 inch 100mm Hidden Blind Supports for Concealed Shelves Pack of 4

Specifications: Material: Iron Shaft Diameter: 10mm / 0.39" Size(Approx.):100 x 70 x 14mm / 3.94" x 2.76" x 0.55"(L*W*H) Mounting Hole Size: 11 x 6mm / 0.43" x 0.24" (L*W). Mounting Hole Distance: 42mm / 1.65" Package Content: 4 Pcs x Concealed Bracket INSTALLATION GUIDE Tools: 1.Every bracket will need screws x2, anchors x2, washer x2. (All are not included) 2.You need to have Level, Drill, Electric Screwdriver, Hammer. (You may need drill press if the shelf is DIY) STEP: 1.Drill holes on wall - You should use level to mark cross on the wall to make sure you drill the holes in the right place. 2.Install the bracket - You can use washers to help the bracket install tightly. Electric screwdriver is highly recommended. 3.Adjustment - Slightly adjust the rod and height of bracket . 4.Insert the shelf - Just simply put it in, what is more important is to prepare slot for the bracket. Not only for the rods, but also for hole bracket. Note: When the load is more than 10kg, it is recommended to install more than 2 supports to increase the bearing capacity.