Fine threaded drywall gypsum screws are very useful for fixing any device on wall or ceiling with the help of nylon wall plugs. It is standard fastener for securing low weighted devices like CCTV, DVR, NVR, ROUTERS, RACKS and many more devices and accessories. HDi cone like head shape of drywall screw helps the screw stay in place easily. It comes in different sizes – half inches, one inches & one and half inches etc.