Automatic Watch Hand Installing Fitting 4 Pin Installation Repairing Tool Parts. Interchangeable stakes made of synthetic material. Enhanced guidance of the spindles. High precision of positioning. Tip sizes (External Ø x Internal Ø). Ø2.60 x Ø1.60mm (Yellow). Ø2.10 x Ø1.20mm (Red). Ø1.70 x Ø0.60mm (Grey).