【Double Rod Base】With this design, only one bracket is enough to fix a small shelf, quite firm and practical. The actual number of brackets used can be adjusted according to the size of the shelf. 【Solid Material】Made of high quality stainless steel which is not easy to rust and bend, ensuring quality and longevity in wet weather. 【Hidden Installation】With these concealed brackets, you don't have to worry about your decoration being ruined by exposed brackets. Besides, it can create the effect that the shelf is floating. They are ideal tools for DIY. 【Product Dimension】200mm x 150mm x 25mm (L x W x H), screw hole diameter: 5mm, dowel diameter: 7mm, Package Content: 2 brackets, 12 dowels and 12 screws. 【Mounting Dimension】 The opening diameter is 10mm and the depth of the bar is 150mm. (The error of ±1mm exists, please drill the hole according to the dimension.)