Quality Thread Boss from Sorcery Manufacturing

These high-quality thread reel's "Thread Boss" feature professional plastic injection-molded parts, longer retraction distances, unbreakable tubes, glass beads for smooth function, and easy maintenance and repair. Each contains 30 feet of invisible thread and allows you to pull out invisible thread for use and retract it when you’re done, saving it for another time. One end of the invisible thread is wound around a center core that automatically winds up the thread for you and the other end is attached to a wax ball. This wax ball makes it easy to find the end of the thread and will stick to just about anything. The Original Thread Boss is just over 2" long and clips on with an alligator clip. ITR is just under 4 inches and attaches with safety pins.