If you have a low shank machine but no snap-on feet you need a low shank snap-on adapter (you can buy this separately from our shop and it is also included in our ultimate presser foot set 32 pcs (bonus adapter, in the slot marked with a star).
Step 1: attach the low shank snap-on adapter (bonus) adapter (B) to your machine’s shank (A) with the holding screw (C).
Step 2-3: place the presser foot under the bonus adapter, lower the presser foot lever so the presser foot bar (F) snaps into the opening in the bonus adapter (E)
Step 4: push the red button (D) at the back of the bonus adapter to release the presser foot from the adapter