Patchwork foot aka Alpha Foot... A misnomer for the Alphasew (brand name) Patchwork Foot. This is a relatively new foot that is used for piecing or anytime you want a perfect quarter-inch seam.

The foot has a quarter-inch 'toe' to the right of the needle and an eighth-inch 'toe' to the left (to prevent interfering with a previously sewn seam). The foot flares about a half inch back from the toe tips to fully cover the feed dogs. There are quarter-inch markings along the right side of the foot and eighth inch markings on the left. The foot is made of metal, is two piece (hinged), and comes with a removable fabric guide (to aid straight-line quilting or basting). PS: This quality foot is about half the price of the Little Foot.