The HoopKeyDoo is the perfect tool for machine embroidery on a BERNINA. Using the HoopKeyDoo, you can easily tighten your embroidery hoops, even with thick material and stabilizer. Many buy two to accommodate their MegaHoops. Compatible with all Bernina hoops except for the Jumbo Hoop. Customers love these finger saving tools, especially those with hand ailments. Made in the USA
