E Track Accessories: this set includes 12 e track backing plates, 48 locking nuts, 48 bolts, and 96 flat washers, providing everything you need for multiple installations; The comprehensive package ensures you have enough accessories to secure your e track rail system effectively and handle large-scale projects with ease Robust Steel Material: constructed from durable steel and galvanized to resist corrosion and rust, these heavy duty e track plates are built to last; The inclusion of locking nuts ensures that the screws stay securely in place, even in high-vibration environments, preventing any loosening over time Precision Size for Optimal Fit: each backing plate measures 3 inches in length and 6 inches in width, with bolting holes spaced 2-1/8 inches apart on-center; Bolt length 2.5 inches; The 1.8mm thickness and enlarged bolting holes are designed to prevent misalignment issues, ensuring a nice fit with your e track systems, providing robust support Easy Installation: drill holes in the wooden board to align with the bolt holes of the backing plate and e track, then tighten the screws to complete the installation; For standard multiple e tracks, it can be installed in the bolt holes on both sides, and for single track, it can be installed in the middle bolt hole Versatile Application for Multiple Uses: compatible with all standard universal e tracks, these track backing plates are perfect for both single and multiple mounting scenarios; Whether you're setting up in a trailer, truck, or workshop, these accessories provide the reliable support needed for a variety of heavy duty applications Features: Over time, the e track mounted on the wooden board may become loose, or if your cargo is too heavy, the E track might wobble. In such cases, a backing plate needs to be installed behind the board to secure the e track Application: Compatible with all standard universal e tracks. These plates are work for single or multiple e track mounts Specifications: Material: steel Size: 3 x 6 inches Package includes: 12 x E track backing plates 48 x Locking nuts 48 x Bolts 96 x Flat washers Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.