Toolholders Type B/W Polledri Srl Toolholders type B/W in carburized and hardened steel hardness 60 HRC. You can fit them rapidly all the interchangeable counterbores an countersink Polledri of the same group. Weldon shank. INTERCHANGEABLES TOOLHOLDERS WELDON SHANK Interchangeable Toolholders Straight Shank Type 0B Interchangeable Toolholders Straight Shank Type 1/B Interchangeable Toolholders Straight Shank Type 2B Interchangeable Toolholders Weldon shank Type 0BW Interchangeable Toolholders Weldon shank Type 1BW Interchangeable Toolholders Weldon shank Type 2BW 10 March 2020