The Dual Function Fold Binder is used to fold 1.25 inch (32mm) wide bias fabric tape into 0.31 inch (8mm) wide double fold bias tape, and then apply the bias tape binding to the edge of fabric.
Also can be used as a binder for single fold bias tape
Brother Accessories Group H
Part number: SA231, SA231CV, 115C03E700B
Brother: CV3440, CV550, LOB31