Coach Screws are a big, heavy-duty screw, used for fastening wood to wood or metal to wood. The coarse thread on the screws, as seen in the image below, allows the screw to grip the material tightly. Pre-Drilling is usually done before the coach screw application, to make sure that the wood does not split when the coach screw is tightened. This is...

Screw bolts and Sleeve anchors are two types of fasteners that are used for securing things into concrete, or other hard materials. This why you will often find these two fasteners have the word "concrete" or " masonry" at the beginning of the fastener name, when found in stores or online.   Both Screw bolts and Sleev...