self drilling roofing bolts

There are several types of expansion anchor bolts available, each with its own unique design and features. Some common types include wedge anchors, sleeve anchors, and drop-in anchors. Wedge anchors are suitable for use in solid concrete and provide a reliable and secure hold. Sleeve anchors are versatile and can be used in various materials, while drop-in anchors are used in overhead applications where the bolt needs to be flush with the surface.

...

Chipboard, also known as particleboard, is a widely used material due to its affordability and versatility. However, its density and composition require specialized fasteners to ensure secure fixing. The 50 mm size refers to the length of the screw, which is 50 millimeters from the head to the tip. This length is typically ideal for thicker chipboard pieces, allowing for adequate penetration into the material without compromising structural integrity.

...