Feed your fabric through the small funnel located on the front of the foot. The funnel turns the fabric under while the needle stitches it down to create a perfect narrow hem.

Guaranteed to fit Juki Sewing Machine Models:
DX-1500QVP, DX-3000QVP, DX-4000QVP, HZL-F300, HZL-F400, HZL-F600, HZL-G110, HZL-G210, HZL-G220