Curve Master 1/4" Presser Foot
The Curve Master will either clip on to your machine or screw on using one of the adapters.  Clipt to Viking, Husqvarna, Janome, New Home, Elna, Baby Lock, Necchi, White and others.  Adapter 1 (shortest):  Low shank, Bernina, Pfaff, Singer Featherweight (Bernina machines require a Bernina adapter in addition to this adapter.)  Adapter 2:  Singer Quantum Adpapter 3:  Singer Slant Needle Adapter 4:  High Shank Brother Adapter 5:  Super High Shank Kenmore Adapter 6 (longest):  Brother 1300, 1500, Juki 98.