Clover's Embroidery Threader works with most types of threads, yarns, and embroidery needles. It is designed with a unique flat tip that allows for easy and smooth threading, even with thick threads. The threads align vertically and pass through the needle eye smoothly thanks to the Embroidery thread's flat tip design. The Embroidery threader works great with Clover's other embroidery tools. Easily prepare your embroidery needles to make beautiful embroidered designs. This tool is the highest of quality and made in Japan.