Self-tapping screws have the ability to tap threads into the material. Self-tapping screws are used for all sorts of materials, including wood, metal, and brick. These screws cannot drill through metal and require a pilot hole to be pre-drilled before installation.
The most common self tappers are type AB screws. They are literally a combination of the Type A and Type B screws. It features the same number of threads as a Type B but has a sharp point similar to a Type A.
All images are indicative only.
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