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Inconspicuous, but a milestone nevertheless, the Hilti S-MS is a screw that does away with drilling. Its designed for use at joints in trapezoidal metal sheets, screw fastenings on air ducts and other applications using thin sheet metal. The screw is simply driven through the sheet metal. As no drilling is required and no metal cuttings are formed during the driving operation, corrosion around the screw hole is effectively prevented. The screw achieves the highest loading capacity of all comparable screws. In conjunction with its own specially-developed stand-up screwdriving tool, this high-speed screw offers great ergonomic advantages.