Compatibility - Fits SINGER sewing machines models 4411 and 4423. This foot pedal replacement is designed to work with those machines. Compatibility check - Please compare the end of the cord shown in our pictures to the plug inlet on your machine. If you are unsure it will match, send us a clear photo of where the plug enters your machine and we will assist you. Installation - Easy plug in replacement. No assembly required. - Replaces an outdated or broken foot control to restore smooth operation and minimize downtime. Operation and benefits - Hands free control: Use the foot pedal to set sewing speed, keeping both hands on the fabric for precise guiding. - Variable speed: The pedal responds to how much pressure you apply, giving you control over stitch tempo and consistency. What makes it stand out - Direct replacement for compatible Singer models, designed for quick installation without tools. - Restores reliable speed control to your machine, helping you achieve even stitches and better project results. Use scenarios - Quilting projects requiring steady, long runs with consistent speed. - Garment construction and topstitching where precise speed control improves seam accuracy. - Repairs or alterations when your current foot control is malfunctioning or difficult to use.