This is a DIY part that attaches to 1x4 lumber (two-by-four) and creates a pillar by tensioning the floor and ceiling. It's perfect for rental properties and redecorating because you can create shelves and storage without drilling holes in the walls. M8x45 cap bolt x1 M8 nut x3 Made of rust-resistant, high-quality stainless steel. *When cutting the lumber, cut it to a length of the desired length - 65mm to 75mm. "Example" If the distance from the floor to the ceiling is 2000mm, cut it to a dimension between 1935mm and 1945mm. Aiming for 1940mm would be safe. 【Features】 Strong bolt-type fixation Unlike spring-type, the structure is tightened with bolts and nuts, so it can be firmly fixed to the ceiling. Simple design With a simple design without unnecessary decoration, it blends in with the interior of your room. 【How to Use】 Set this product on both ends of 1x4 lumber purchased at a home center, etc. Stand it in the place you want to install it. Turn the upper M8 nut with a 14mm spanner or monkey wrench, and adjust it to tension towards the ceiling. 【Examples of Use】 For display shelves for houseplants and plant hangers For wall-mounted storage of hats and bags For cat walk pillars, etc. 【Please Note】 A 14mm spanner is required for installation. Please prepare it separately. Please use it in a place where the ceiling has sufficient strength (a place with a subfloor). 【Please read before purchasing: Product specifications and precautions】 This product is manufactured using a 3D printer. Please understand the following characteristics before purchasing. ■ About the unique texture of 3D printers Due to the manufacturing process, fine horizontal stripes called "layer lines" and slight unevenness and stringing may occur on the surface. These are not defects, but rather the unique individuality and texture of 3D printed products, so please enjoy the differences in each one. Please note that the surface is not as smooth as commercially available mass-produced products. ■ About heat and storage location (Important) Because it uses a heat-sensitive material, it may deform or dissolve at temperatures around 60°C. Please avoid using and storing it in the following places.