Premium Replacement 240078 Double Row Feed Dog for heavy-duty sewing applications, designed to be used with needle plate 240027. This high-quality double row feed dog ensures consistent fabric feeding and precise stitching on thick or heavy materials. Compatible with Brother B837, Juki LU-563, Singer 111W, and Seiko STW-8B walking foot industrial sewing machines, it is ideal for upholstery, leatherwork, and other heavy fabric projects.