Eureka Self Tapper Raised Head Countersunk Galvanised 25-Piece Set, 3.9mm

Self-tapping point cuts its own thread as it drives into sheet metal Goes straight into thin steel and plastic without a pre-drilled pilot hole Fastening sheet metal and plastic; the thread cuts its own mating thread as it drives Wood / Timber Can be used as a permanent and non-permanent fastening solution.Includes a Phillips head that can be installed with a phillips bit/screwdriver. CANNOT use a Pozi bit.Used when you don't have access from the rear to install a bolt and nut.Used instead of blind rivets.