double end right and left hand threaded rods

A hex washer head bolt is essentially a threaded rod with a hexagonal head, providing a larger surface area than a standard hex bolt. The integrated washer portion of the bolt serves two primary functions. Firstly, it distributes the clamping force over a wider area, preventing damage to the material being fastened and reducing the risk of loosening due to uneven pressure. Secondly, it increases the friction between the bolt and the surface, enhancing the holding power and ensuring a secure connection.

...

One of the key advantages of resin anchor bolts is their ability to provide a strong and reliable connection between materials. The resin material allows the bolt to bond securely to the surface it is anchoring to, ensuring that the connection is durable and long-lasting. This makes resin anchor bolts ideal for applications where a secure fastening is essential, such as in construction scaffolding, bridge building, or structural steelwork.

...