Unior&';s tensiometer easily measures the spoke tension on any kind of spoke Arrives ready to use in a protected carrying case and includes a reference rod so you can calibrate the tool To use, simply press the handle, position the spoke between the two pins and release the handle Properly designed gauge is easy to read Measured value is then cross referenced in the spoke information table, from where you read the actual tension based upon the spoke specification Printed table is included with the tool, together with more precise usage instructions Additional included feature on the tool is a spoke thickness gauge, which helps to identify which line in the conversion table you should be referencing. Simply insert the spoke in one of the upper openings and read the spoke thickness