Hand quilting thread is not supposed to go in a machine. The glaze can damage the machine somehow. Even if it doesn't say " hand" quilting, you can tell it's glazed by the wiry-ness of it. I've been a hand quilter all this time and have a big collection of hand quilting thread-C&C, DMC, Mettler. I'm hoping to become proficient at machine quilting, so I've bought King Tut and Aurifil in 28 and 40 wts. I used to use C&C, Gutermann, and Mettler for piecing, but I've recently change to Aurifil 50wt and Masterpiece. I usually use whatever matches and blends for hand appliqué, but I ordered a pack of Superior BOBs to try. I'm hoping the Aurifil works for that too, because I ordered a LOT from Tristan Threads Aurifil clearance (thx to a tip from Candace from Elk Grove CA on this board). The Aurifil is FAR less linty than anything I had used before.