Centers are provided with the Nut. Run out between shank and points is accurate to ±0.0002" T.I.R. These dead centers are designed for use wherever high accuracies are required. Case hardened to 61-63 HRC. Carbide tipped centers give longer tool life and require less regrinding. Center 8725 is thread-ed and provided with the nut to remove the center from a tailstock.