The Baby Lock Compensating Foot is designed to handle variations in the thickness of a hem. This foot is spring loaded in both the front and read of the foot and will adjust to thickness changes while stitching a flawless hem when using either the Triple, Wide, or Narrow Cover Stitch. For Models: BLETS8, BLETS8AE, BLSP8, BLS8, BLES8, BLE8W-2, BLE8W, BLE8, BLP6, BLC4, BLCS-2