General description 10Pc BT40 90 Degree Pull Stud Retention Knob is designed for precision and durability. After carburizing, the outer material is hardened while the inner material remains soft, providing sufficient toughness. The precision polishing of the flange bottom enhances the fit with the tool holder's cone tip. Each pull stud undergoes magnetic particle flaw detection to identify cracks, ensuring safety and reliability. Technical specifications Replacement for Seiki Taper: BT 40 Button angle: 90° Button diameter: 0.589 inch Neck diameter: 0.392 inch Pilot diameter: 0.669 inch Length (L): 2.360 inch Length (L1): 1.100 inch Length (L2): 1.376 inch Button Socket: RKW40 Color: Silver Material: Alloy Steel Package contents 10 x Wheel Stud Removal Tool Other information Note: Light reflection and different displays may cause the color of the item to differ slightly from the actual product. The measurement allowed error is +/- 1-3 cm.