Easy to use - attaches to multi-needle machine just like any other hoop. Durable but lightweight - all metal construction with anodized aluminum plate and stainless steel arms. Vertical slots in the front and back of the frame plus alignment guides to aid in achieving consisten hooping results. Extra-large sewing field - much larger than many cap embroidery systems and at a fraction of the price. Can hoop the back of a cap as well as the front! Will work with: Brother:PR600, PR600II, PR600C, PR620, PR620II, PR650, PR650E, PR655, PR1000, PR1000E Baby Lock:EMP6, BMP8, BMP9, ENT10, BNT10L, BND9, BND9-2