Patent Protection Protected by patents and applications in multiple countries. Built for embroiderers with stronger magnetic grip and smoother daily hooping. Super Magnetic Power Long-bar magnets create a larger magnetic area and stronger holding force to secure your fabric firmly on the machine. Easy Fabric Adjustment Unlike one-piece upper frames, you can simply lift the magnet, straighten the fabric, and reattach—quick and effortless. Soft Protective Coating The solid metal bottom frame is covered with a soft coating to prevent scratches and reduce fabric slipping during embroidery. No Hoop Marks Fixes fabric quickly without leaving hoop marks, saving time and improving stitch results compared with regular hoops. Smooth, Time-Saving Hooping Designed for fast setup and stable embroidery, making daily hooping easier and more efficient. Packing List： 4 x Magnetic Embroidery Hoop Set: SA437MK(EF73M) - Embroidery Area: 1x2.5 inches (20x60mm) SA438MK (EF74M) - Embroidery Area: 4x4 inches (100x100mm) SA439MK (EF75M) - Embroidery Area: 5x7 inches (130x180mm) SA441MK (EF81M) - Embroidery Area: 6x10 inches (160x260mm) 24 x Magnets 4 x Grid Template