The __ screw has six ridges on the top that make the fastener less likely to strip out. a. Square screw b. Torx head screw c. Slotted screw d. Phillips screw d. Types of lumber dereets

## Step 1<br />The problem is asking us to identify the type of screw that has six ridges on the top. This is a characteristic of a Torx head screw. <br /><br />## Step 2<br />Torx screws are known for their star-shaped design, which is different from the traditional Phillips screw, which has a cross-shaped design. <br /><br />## Step 3<br />The unique design of Torx screws allows them to provide more torque than a standard screw, making them less likely to strip out. <br /><br />## Step 4<br />The other options, such as square, slotted, and Phillips screws, do not have this characteristic.