JA41-2345MK Metal Magnetic Embroidery Hoop kit (Long-bar Magnets) for Janome Memory Craft MC400E MC450E MC500E MC550E,Elna Expressive 830 830L Embroidery Machine5 Reasons to Choose Our Magnetic Hoops 1. Long bar magnets = stronger, smoother hold Unlike round or spot magnets, our exclusive long bar design applies even pressure across the entire frameno shifting, no puckering, just perfectly flat fabric every time. 2. Snap on in seconds, no struggling Hooping shouldn't be a hassle. Just align and pressno screws, no clamps, no wasted time. 3. Designed for thick & tricky materials From denim and towels to