Professional tool for commercial or occasional use Universal cam belt tensioning gauge For adjusting the tension of drive belts on various serpentine and camshaft belt thicknesses Adjustable dual scale graduations (nm) readable from the front and the back of the tool Made from hardened steel with a smooth rolling screw action and knurled grip edge for maximum grip and durability Suitable for use on all vehicles This tensioning gauge can be used to adjust the tension on the cambelt where the movement of the timing belt is measured by load Suitable for belts with various widths Clear incremental marking Knurled knob for precise measurement