Your machine's picker determines the length of the thread tails and prevents birds nests. Here's how to tell if it's working properly. Gunold offers a variety of Machine Embroidery Thread in a wide selection of thread colors and sizes. Shop our selection of Machine Embroidery Backings and our complete array of wholesale embroidery supplies and machine embroidery software. If you have any questions or need assistance, please get in touch with us at [email protected] or call 800-432-3781.