Function: The belt tensioning tool is used to measure tension of flat, drive belts and toothed cam belts, where tension is specified as movement of belt against applied load (Nm). Easy to Use: Adjusts tension of drive belts on and camshaft belt thicknesses Professional Tool: Adjustable dual scale graduations (Nm) readable from front and back of tool. Material: Made from Metal with a smooth rolling screw action and knurled grip edge for maximum grip and durability Compact: Car Drive Timing Belt Tensioner is compact and easy to use on belts of any width. Name:Timing Belt Tension Tester Type:Auto parts Colour:As Shown Material:Metal + Plastic Package Contents: 1 x Timing Belt Tension Tester Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.