ITEM NAME:10PCS BT30 X 45 Degree M12 Pull Stud Fixed Knob CNC Milling Machine Parts C S9R8 10PCS BT30 X 45 Degree M12 Pull Stud Fixed Knob CNC Milling Machine Parts C S9R8 Machine taper: BT30 Thread: M12 Head diameter: 11 mm Neck diameter: 7 mm Full length: 43 mm Angle: 45 degrees Color: black and silver Material: steel Package Contents:10*CNC shank fixing screw