Bore Miter Gear Bore Diameter 10 mm Bore Diameter Tolerance H7 Bore Type Finished Face Width 6 mm Finish Black Oxide For Shaft Angle 90 Degrees Gear Shape BT Hub Diameter 20 mm Hub Projection 8 mm Hub Type Hub with Set Screws Includes Set Screw Material Carbon Steel Material Grade S45C Maximum Teeth Hardness 60 HRC Metric Module Pitch 1 Minimum Teeth Hardness 50 HRC