1USAGE: Sewing basting tape is a very practical tool for quilting sewing, sewing diagonal seams, straight line can help sewing more straight and symmetrical. 2STRONG ADHESION: Ideal adhesion, no residue left after peeling off the tape, easy to handle. It is recommended to remove or replace the tape frequently or after each project to avoid leaving any residue on the machine. 3EASY TO HANDLE: The red line in the middle is aligned with the machine's needle, and the black lines on both sides are 1/4 inch from the center of the line to each side, which represents 1/4 inch sewing capacity; simply place the tape with the red line in front of the needle as a seam allowance. 4MUST HAVE TOOLS: 1/4 inch seam diagonal seam tapes are a must have tool for anyone who enjoys quilting, sewing or crafting. 5ENOUGH QUANTITY: The package comes with 4 rolls of 1/4 inch seam diagonal seam tapes, enough to meet your various needs in daily life.