This hoop is compatible with Brother PR1000E PR1000 PR1050X PR1055X Baby Lock Valiant Enterprise etc., Sewing and Embroidery Machine Hoop. Other compatible machines, please check your machine manual. (Note: There are 2 Types of Embroidery Frame Holder for the Machines: Holder A and Holder B. This PRPJF360 Hoop can only be used on the Embroidery Frame Holder B with a Mark "B" on the Light Gray Corner Cover) Sew Tech embroidery machine hoops are accurate and strong Clear markings on hoops for easy reference Adjustable metal screw on the hoop help you to clamp a wide range of fabric firmly Used as a perfect replacement of the old hoops or have extra hoops to speed up your embroidery projects