Feature: 1. Good Compatibility: This embroidery hoop lock knob is specifically designed to work with a variety of popular embroidery machines, including for Viking models such as for Topaz 50, for Topaz 40, for Sapphire 85, for Jade 35. Its compatibility with numerous models makes it a versatile tool for any embroidery enthusiast. 2. Rugged Construction: Made from a combination of excellent plastic and iron, the embroidery hoop fastening knob is built to last. This sturdy construction not only provides good performance but also enhances the longevity of the tool, allowing you to use it confidently for all your embroidery needs over the years. 3. Easy Operating: The design of the embroidery hoop tightening lock allows for simple and quick adjustments. Its user friendly mechanism means you can easily tighten or loosen the fabric as needed without complicated procedures, increasing your efficiency and enjoyment during the embroidery process. 4. Multifunctional: The embroidery hoop tightener is a crucial part of any embroidery frame, designed to secure the fabric firmly in place. By keeping the material taut and slick during the embroidery process, it ensures accurate stitching and helps achieve beautiful, consistent results in your embroidery projects. 5. Wide Application: This embroidery hoop tightening screw has a wide range of applications, it can be used for clothing design, handcraft, furniture decoration, etc., used to replace the old or damaged originals. Specification: Item Type: Embroidery Hoop Tightening Lock Material: Plastic, Iron Application: for Viking Topaz 50, for Viking Sapphire 85, for Viking Jade 35, for Performance 5.0, for Vision 5.0, for Vision 5.5, for Performance, for Sensation, for Sensation Pro, for Expression 3.0, for Expression 4.0, for Performance 5.2. Package List: 1 x Embroidery Hoop Tightening Lock