General description Pack of 200 self-drilling sheet metal screws with a large domed head, designed for rapid penetration of metal without the need for pre-drilling. These screws are fully threaded and made from zinc-plated steel, ensuring rust resistance and durability. Ideal for various applications including metal framing, aluminum profiles, and sheet metal fastening. Technical specifications Material: Zinc-plated steel Drive System: Phillips Head (Cross) Head Style: Round, Domed Size: Ø4.2x19mm Head Diameter: 11mm Height of Screw (with head): 21mm Unit Weight: 1.71g Usage Metal-to-metal fixings Steel construction Carpentry work Interior design Sheet metal fastening Metal cladding Tightening gutters Mounting grilles Sheet metal roofing