you can use it for anything you like...for quiting, to secure a block or design...like I am doing one now, with flying geese patterns..I will go around those with the double needle..or for applique, you can use it then 2, with 2 colors thread, if you like....anything you can imagine...I wouldn't buy a sewing machine that did not have this option. My old husky has it too, and I love it, I did industrial sewing for many years, and we used the doube stitch alot.