This is an adjustable swing gauge #124028 which comes with two (2) screws. The proper use of this swing gauge is to adjust the gauge in order to sew even rows of stitches.
Adjustable Swing Gauge #124028
Adjustable swing gauge #120428 for sewing machines which comes with two (2) screws. When using this gauge, it is used properly to perform even rows of sewing stitches.
Manufacturer: FEIT SEW
MPN: 124028
SKU: 124028