"Hardness Rc 63-65. | Clearance angle 8\u00b0. | Segments of HSS M2-DIN 1.3343. | Sizes range from 250mm to 1610mm diameter in various tooth profiles. | Chrome Vanadium steel body with cutting angle 18\u00b0. | Addison offers a full resharpening service including fitting new segs and smithing."