Fangrui Product Details Precise Edge Positioning: The Magnetic Seam Guide Adheres Firmly To The Metal Needle Plate Of The Sewing Machine With A Strong Magnet, Providing A Stable Sewing Experience, And Its Polygonal Design Ensures Accuracy Precise Fit Stitching: Suitable For Any Sewing Machine. Perform The Duties Of The Sewing Ruler And Guide Rail, Which Helps You Measure The Sewing Length. This Is A Great Sewing Accessory For A Sewing Machine Equipped With A Scale: This Strong Magnetic Ruler Comes With A Clearly Graduated Scale For Measuring As Well As For Small Home Decor Projects, Choosing From Three Bright Colors To Personalize Your Sewing Settings And Add A Touch Of Style To Your Workspace Easy Installation: Easy Installation And Adjustment Of Our Magnetic Seam Guides Without Screws Or Adhesives, This User-friendly Saves Time And Provides Precise Stitching For A Professional-looking Result Wide Range Of Applications: Compatible With Most Popular Models Of Sewing Machines, Can Be Widely Used In Various Sewing Machine