Rotary Hook Assembly for Industrial Lockstitch Single Needle Sewing Machines With Automatic Thread Trimmer. Hirose Hook # : HSH-7.94BTR This rotary hook is used on single needle machines with automatic thread undertrimmers but it can also be used on sewing machines without this mechanism. Genuine Hirose Rotary Hook. Made in Japan. This Rotary Hook Assembly will fit industrial lockstitch sewing machines including : Artisan : 196R, 5550N, 8500N, ZJ-100 Brother : B705, B707, B715, B716, B737, B738, B755, B757, B758, B781, B792, B795 Consew : 210, 218, 219, 220, 230, 290, 310, CN2230 Juki : DDL-127, DDL-227, DDL-500, DDL-555, DDL-555-5, DDL-5530, DDL-5550, DDL-5550-6, DDL-5550N-7, DDL-8300, DDL-8500, DDL-8700, DDL-8700-7, DDL-9000, DLM-522, DLM-5400, DLN-412, DLN-415, DLN-415 Singer : 120U, 121C, 121D, 191D, 241, 251, 281, 366K, 400W, 402W, 451K, 491D, 591D, 600W, 660A, 691D, 770D, 771D, 2491D And many more!