39x JM31647H Retention Knobs CAT50 Pull Stud CAT 50

39x retention knobs for CAT50 tool holders, works with Matsuura Mam72 100H Horizontal Machining Center 2014 some are engraved: JM31647H S/N 02716-003437 30025/007 ALL ARE PRE-OWNED looks like all or most support TSC or through spindle coolant