Self-tapping screws are mainly used to fill the gaps in the wall, with their own edges which can cut into the material. This will create an even stronger hold and you won’t have to worry about it falling out. This type of screw certainly isn’t designed like a nail and is often used to hang heavy pictures, boards, or even put together furniture. Most construction workers prefer screws over nails because of their effectiveness. Projects that use self-tapping screws could range from do it yourself projects to even at your dental office at work, by using a screw for implant surgery. When the screw is driven into any type of material, it’s sharp and spiraling sides can cut into the material, providing a great hold.