These are 2 sets high quality guide presser foot has a guide to the right side of the sewing needle. Used for topstitching. There are 9 sizes to choose from. Size indicates the distance between the sewing needle to the sewing guide on the right. This guide foot will fit most industrial single needle straight stitching sewing machines including : for ARTISAN : 196R, 5550N, 8500N, ZJ-100 for BROTHER : B705, B707, B715, B716, B735, B737, B738, B745, B755, B757, B758, B767, B781, PQ1300, PQ1500 for CONSEW : 30, 98, 99, 102, 103, 105, 210, 217, 218, 219, 220, 230, 290, 310, 2230, 7360R-1 for ECONOSEW : DDL-5550, DDL-8500, DDL-8700 for FEIYUE : 8500, 8700 for GEMSY : 8700 for JANOME : 1600P, 1600P-DB, 1600P-DBX for JUKI : DDL-127, DDL-227, DDL-500, DDL-552, DDL-553, DDL-555, DDL-5530, DDL-5550, DDL-5600, DDL-8300, DDL-8500, DDL-8700, DDL-8900, DDL-9000, TL98E, TL98Q for MITSUBISHI : DB-120, DB-121, DB-122, DB-126, DB-130, DB-170, DB-189, DB-199, LS2-130, LS2-150, LS2-180, LS2-190, LS2-1130 for Necchi : BU, supernova, and others with the high shank presser foot system for RELIABLE : MSK-8800, MSK-8550M, MSK-8870M for REX : RX8500 for SINGER : 31-15, 95, 96, 120U, 121C, 121D, 188K, 191D, 195K, 196K, 241, 251, 281, 366K, 400W, 402W, 451K, 491D, 591D, 600W, 660A, 691D, 770D, 771D, 2191, 2491D for SUNSTAR : KM-123A, KM-123B, KM-137A, KM-137B, KM-146BL, KM-250 for TACSEW : 5550, 8500, T8700 for TAIKO : TK-505, TK-510 for Viking : 33-10, Mega quilter & Other High Shank models for YAMATA : FY8500, FY8700 and many others!!