The gear is rolling, the tooth head is pointed, and the distance of the pressed hole is a little more than 2 mm This tool is a single wheel needle spacing wheel/cloth press wheel, suitable for cloth, paper, leather, etc. Press out the track of the seam, so you are not afraid that the thread will not be straight when you sew something. You can also put scratching powder in the cloth pressing wheel trolley, it will leave footprints on your baby, not afraid that you will not find it Dot-shaped imprints are pressed on the cloth, which can easily keep sewing along a straight line