ARKSEN Universal Twin Cam Locking Timing Tool Kit For Petrol Diesel Engines Automotive Fits On To Sprockets And Extends To Lock In To Sprocket Teeth Adjustable Arms To Fit Various Diameters And Teeth Pitches Suitable For Locking Between Cam and Diesel Injunction Pump Sprockets Easy to Use, One man operation Designed To Lock Twin Camshafts To Timing