The b&m-SHEETFORM® is provided with a forming zone specially designed for thin sheet metal applications (t ? 2mm). This is particularly suited for screw connections in through-holes or passages. When the core hole is optimally designed, the b&m-SHEETFORM® forms a hole-reinforcing collar from the sheet metal, which increases the number of threads in the clearance-hole and guarantees a connection with a high load capacity.