Usage: in cloth dot print can keep out, along the line of sewing cloth

paddle wheel is you can walk around the shape you, then non woven in a hole, pin is connected to two holes, so the pin is very uniform, each stitch is the same length.
DIY essential

suitable for various types of fabric, leather, paper and other line use. Can also be drawn at the same time, oh! A very good use of DIY hand tools