Produced in Milan, Italy, Aurifil Thread is the most popular thread within the quilting and sewing industry. Aurifil also has locking spools. Can't find the thread end? Twist and turn the cap to remove it from the spool core, the thread end will be tucked under the cap. Return the cap to the core and begin sewing! It's that easy. Also note, the bottom of the cap will contain color/weight information - make sure you keep cap and spool together. When you are finished sewing, take the cap off and tuck the thread end under, replace cap and no more thread tails!!