https://www.biasbespoke.com/tools-of-the-trade/hinged-industrial-sewing-machine-feet-for-top-stitching-in-5-widths.html
Hinged Industrial Sewing Machine Feet for Top-Stitching, in 5 Widths
Sturdy, good quality machine feet for industrial sewing machines (not home sewing machines). These feet are ideal for professional-looking top-stitching along...
industrial sewing machinefor top stitchinghingedfeet