General description Pack of 200 self-drilling sheet metal screws with a large domed head, designed for rapid penetration into metal without the need for pre-drilling. These screws are fully threaded and made from zinc-plated steel, ensuring durability and rust resistance. Technical specifications Material: Zinc-plated steel Drive System: Phillips (Cross) Head Style: Round, Domed Size: Ø4.2x19mm Head Diameter: 11mm Height (with head): 21mm Unit Weight: 1.71g Usage Ideal for metal-to-metal fixings such as metal frames and aluminum profiles Applications include steel construction, carpentry work, interior design, sheet metal fastening, metal cladding, tightening gutters, and mounting grilles and sheet metal roofing