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presser foot mount (connector): 1 4inch 6 mm, 3 8inch 10 mm, 5 8inch 16 mm presser foot installation method: 1. observe the original bracket and remove it; 2, remove the original bracket with a screwdriver; 3. install the bracket and tighten the screws with a screwdriver; 4. put on the presser foot hole and the fixing screw on the bracket to be used; 5, tighten the fixi