The Hook B1808-771-0A for Buttonhole (Part #RSH-781) is a genuine JACK original replacement part designed for JACK JKT-781, JKT-782 and JKT-783 series button sewing machines, as well as Juki LBH-771, LBH-780 and Speedway SW781D series models. Manufactured to OEM specifications for precise fit and reliable performance. Equivalent Part Numbers JACK: RSH-781 Compatible: B1808-771-0A0 Compatible Machines This part fits the following industrial sewing machine models: JUKI: LBH-771, LBH-780, LBH-1790 SPEEDWAY: SW781D JACK: JKT-781, JKT-782, JKT-783 Technical Specifications Brand JACK Part Number RSH-781 Part Type Hooks Condition New – OEM Original Looking for a replacement hook b1808-771-0a for your JACK JKT-781 or JKT-782 button sewing machine? This genuine OEM part is also compatible with Juki LBH-771 and Speedway SW781D series machines. Shop with confidence — all parts ship from Miami, FL. ⚠️ Compatibility Notice: Always verify your machine model and subclass number before ordering. Part numbers and compatibility are provided as a reference only. Supra Sewing is not responsible for purchases made without confirming compatibility with your specific machine. All sales on replacement parts are final.