1. The sinkhole presser foot is a kind of presser foot specially used for wrapping rubber bands. It has a groove, which can clamp the cloth and rubber bands together to prevent catching or eating the cloth, and the sewn effect is smooth and beautiful.

2. Roller presser foot is a universal presser foot with one or more rollers, which can slide smoothly during sewing and is suitable for various fabrics and thicknesses. Therefore, it is good to use the pit presser foot and the roller presser foot to pack the rubber band on the flat car.