Retention knob for makino A55 pull stud w/ coolant thru

What is for sale: Retention knob for makino A55 pull stud w/ coolant thru

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These Pull Studs are brand new. They fit in 40 taper tool holders. As far as I know they fit Leblond Makino A55 Horizontal machining centers, but could also fit in others. Call if you have any questions, ask for Mauro, (***)-387-3600.