This external needle positioner works with industrial sewing machines to provide accurate needle stop position control, allowing you to choose whether needle stops in up or down position. Compatible with brushless synchronous motors, this device helps maintain consistent quality and improves overall sewing accuracy. By controlling exact needle positioning, this device reduces production time and increases workflow efficiency. The synchronizer allows for smoother transitions between sewing operations, minimizing fabric waste and improving quality of your finished products. Designed specifically for industrial sewing machines with handwheels that are fixed or screwed to spindle. The blacks metal construction offers LONG LASTING performance in demanding industrial environments, though adapters may be required for certain machine models. The positioning rod fits securely into sensor slot with two set screws for adjustable positioning, allowing you to fine-tune exact needle stop position for your specific sewing requirements. Color:As Shown Material:plastic Package Contents: 1 * industrial sewing machine Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.